![This period is after embryonic organogenesis is complete; therefore, a 35-day fetus can be recognized as canine. External features characteristic of fetal stages are development of pigmentation, growth on hair and claws, closure and fusion of the eyelids, growth of the external ear, elongation of the trunk, and sexual differentiation [9]. 4.1.. Wings sports bar and grille](/img/512x512/63702628155.webp)
Taken together, these findings clearly indicate that tumors develop over years and decades, during which embryonic cell types directly exposed to a carcinogen may participate in the normal steps of embryonic and fetal development, to eventually differentiate as functional adult cell types.As pregnancy progresses the embryo becomes a fetus. The fetus becomes a neonate or newborn at birth. It may not be common to hear a pregnant person speak about their embryo or fetus in those terms, but we can all choose to use the words we are most comfortable with. A better understanding of embryonic and fetal development can expand our word ...A. Trophoblast = outer covering of cells (just beneath the zona pellucida) o This will become the chorion, which forms the fetal. portion of the placenta. B. Inner Cell Mass (ICM) = cells concentrated in one portion of the inner cavity. o These cells will contribute to the formation of the. embryonic body. C. Blastocoele = internal fluid-filled ...The 3 primary stages of prenatal development are the germinal period, the embryonic period, and the fetal period. Each of these stages is important for reaching the ultimate goal of a healthy baby.Jun 4, 2013 · Of those causes, failure of development of conceptuses (embryo and extra-embryonic membranes) during the peri-implantation period is primarily responsible for embryonic losses before day 30 of gestation and inadequate uterine capacity is the major reason for fetal deaths and suboptimal growth after day 30 (Bazer et al. 2009a, b). Taken together, these findings clearly indicate that tumors develop over years and decades, during which embryonic cell types directly exposed to a carcinogen may participate in the normal steps of embryonic and fetal development, to eventually differentiate as functional adult cell types.The embryonic stage of gestation is the period after implantation, during which all major organs and structures within the growing mammal are formed. Once the embryo is fully formed, it expands, grows and continues to develop into what is known as the stage of fetal development. This is when the mother becomes physically and visibly pregnant. 71. Fertilization and Development. In approximately nine months, a single cell—a fertilized egg—develops into a fully formed infant consisting of trillions of cells with myriad specialized functions. The dramatic changes of fertilization, embryonic development, and fetal development are followed by remarkable adaptations of the newborn to ...An embryo at the end of 7 weeks of development is only 10 mm in length, but its developing eyes, limb buds, and tail are already visible. (This embryo was derived from an ectopic pregnancy.) (credit: Ed Uthman) During the sixth week, uncontrolled fetal limb movements begin to occur.Canine embryonic and fetal development: a review. 2008 Aug;70 (3):300-3. doi: 10.1016/j.theriogenology.2008.04.029. Epub 2008 May 29. The progression from a fertilized oocyte to a newborn puppy is a remarkable phenomenon that occurs in a period of approximately two months. Embryonic development encompasses the period of time at which three germ ... Fetal development continues during the third trimester. Your baby will open his or her eyes, gain more weight, and prepare for delivery. By Mayo Clinic Staff. The end of your pregnancy is near! By now, you're eager to meet your baby face to face. Your uterus, however, is still a busy place. Here's a weekly calendar of events for fetal ...Learn about human embryonic and fetal development from fertilization to birth. Encyclopædia Britannica, Inc. Track the development of a human being from embryo to fetus to newborn. Compare the elephant's 95-week gestation period with the marsupial American opossum's 12-13-day gestation.Jul 22, 2023 · Fetal Development & Fetal Growth Assessment. In the realm of maternal care, understanding and monitoring fetal development and fetal growth are paramount for ensuring the well-being of both the mother and the developing baby. The intricate processes of fetal development, from conception to birth, lay the foundation for a healthy and successful ... As pregnancy progresses the embryo becomes a fetus. The fetus becomes a neonate or newborn at birth. It may not be common to hear a pregnant person speak about their embryo or fetus in those terms, but we can all choose to use the words we are most comfortable with. A better understanding of embryonic and fetal development can expand our word ...Jun 3, 2022 · Eight weeks into your pregnancy, or six weeks after conception, your baby's lower limb buds take on the shape of paddles. Fingers have begun to form. Small swellings outlining the future shell-shaped parts of your baby's ears develop and the eyes become obvious. The upper lip and nose have formed. Study with Quizlet and memorize flashcards containing terms like Developmental psychologists study physical, cognitive, and ________ changes throughout the human life span. A) zygotic B) embryonic C) genetic D) social, Dr. Birkin's major research interest is the development of motor skills in children. It is most likely that Dr. Birkin is a ________ psychologist. cognitive developmental ...The embryonic period is all about the formation of important systems of the body. Think of it as your baby’s basic foundation and framework. The fetal period, on the other hand, is more about...An embryo at the end of 7 weeks of development is only 10 mm in length, but its developing eyes, limb buds, and tail are already visible. (This embryo was derived from an ectopic pregnancy.) (credit: Ed Uthman) During the sixth week, uncontrolled fetal limb movements begin to occur.The average fetus at 15 weeks is 6.6 inches (16.7 cm) long and weighs 4.1 ounces (117 grams) . Gestational Age 16 to 17 weeks (3.7 to 3.9 months) . Fetal Age 14 to 15 weeks. The average 16 week fetus is 7.3 inches (18.6cm) long and weighs 5.2 ounces (146 grams) . Hearing is beginning to form [12]. Aug 1, 2008 · Embryonic development encompasses the period of time at which three germ layers differentiate: ectoderm, mesoderm, and endoderm. Organ systems are formed from these germ layers, with most of the reproductive tract being derived from mesoderm. Organogenesis is complete prior to the fetal stage in canine embryos, but sexual differentiation occurs ... The pre-axial border medially moves between the fetal and early postnatal periods, and the foot sole can be placed on the ground. Nonetheless, the precise timeline when this posture is achieved remains poorly understood. The hip joint is the most freely movable joint in the lower limbs and largely determines the lower-limb posture. The present study aimed to establish a timeline of lower-limb ...Research on the teratogenic effects of cocaine began in the early 1980s, and in 1985 research on the effects of cocaine on prenatal development gained widespread attention. Since then, numerous studies have contributed to information about the detrimental impacts of maternal cocaine use on embryonic and fetal development.The fetal stage lasts a total of approximately 30 weeks. Figure \(\PageIndex{2}\) shows a seven-week-old embryo that is just getting ready to begin the fetal stage of development. At 7 weeks the embryo is about 10 mm long and has a big forehead. It is developing the inner ear but not the outer ear. The limb buds are visible.Prenatal development (from Latin natalis 'relating to birth') includes the development of the embryo and of the fetus during a viviparous animal's gestation. Prenatal development starts with fertilization, in the germinal stage of embryonic development, and continues in fetal development until birth . In human pregnancy, prenatal development is ... Jul 22, 2023 · Fetal Development & Fetal Growth Assessment. In the realm of maternal care, understanding and monitoring fetal development and fetal growth are paramount for ensuring the well-being of both the mother and the developing baby. The intricate processes of fetal development, from conception to birth, lay the foundation for a healthy and successful ... Jan 22, 2014 · Teratogens may affect the embryo or fetus in a number of ways, causing physical malformations, problems in the behavioral or emotional development of the child, and decreased intellectual quotient (IQ) in the child. Additionally, teratogens may also affect pregnancies and cause complications such as preterm labors, spontaneous abortions, or ... Canine embryonic and fetal development: a review. 2008 Aug;70 (3):300-3. doi: 10.1016/j.theriogenology.2008.04.029. Epub 2008 May 29. The progression from a fertilized oocyte to a newborn puppy is a remarkable phenomenon that occurs in a period of approximately two months. Embryonic development encompasses the period of time at which three germ ... During weeks 9–12 of fetal development, the brain continues to expand, the body elongates, and ossification continues. Fetal movements are frequent during this period, but are jerky and not well-controlled. The bone marrow begins to take over the process of erythrocyte production—a task that the liver performed during the embryonic period.Human embryogenesis. Embryogenesis, the first eight weeks of development after fertilization, is an incredibly complicated process. It’s amazing that in eight weeks we’re transforming from a single cell to an organism with a multi-level body plan. The circulatory, excretory, and neurologic systems all begin to develop during this stage.Maternal glucocorticoids critically rise during pregnancy reaching up to a 20-fold increase of mid-pregnancy concentrations. Concurrently, another steroid hormone, progesterone, increases. Progesterone, which shows structural similarities to glucocorticoids, can bind the intracellular glucocorticoid receptor, although with lower affinity. Progesterone is essential for the establishment and ... A developing human is referred to as an embryo during weeks 3–8, and a fetus from the ninth week of gestation until birth. In this section, we’ll cover the pre-embryonic and embryonic stages of development, which are characterized by cell division, migration, and differentiation.This review article describes key cardiac progenitors involved in embryonic heart development; the cellular, physiological, and anatomical changes during the transition from fetal to neonatal circulation; as well as the unique impact that different pregnancy complications have on cardiac remodeling. An embryo at the end of 7 weeks of development is only 10 mm in length, but its developing eyes, limb buds, and tail are already visible. (This embryo was derived from an ectopic pregnancy.) (credit: Ed Uthman) During the sixth week, uncontrolled fetal limb movements begin to occur.The embryonic stage of gestation is the period after implantation, during which all major organs and structures within the growing mammal are formed. Once the embryo is fully formed, it expands, grows and continues to develop into what is known as the stage of fetal development. This is when the mother becomes physically and visibly pregnant. The placenta is the largest fetal organ, and toward the end of pregnancy the umbilical circulation receives at least 40% of the biventricular cardiac output. It is not surprising, therefore, that there are likely to be close haemodynamic links between the development of the placenta and the fetal heart. Development of the placenta is precocious, and in advance of that of the fetus. The ...Canine embryonic and fetal development: a review. 2008 Aug;70 (3):300-3. doi: 10.1016/j.theriogenology.2008.04.029. Epub 2008 May 29. The progression from a fertilized oocyte to a newborn puppy is a remarkable phenomenon that occurs in a period of approximately two months. Embryonic development encompasses the period of time at which three germ ... This review article describes key cardiac progenitors involved in embryonic heart development; the cellular, physiological, and anatomical changes during the transition from fetal to neonatal circulation; as well as the unique impact that different pregnancy complications have on cardiac remodeling.The 3 primary stages of prenatal development are the germinal period, the embryonic period, and the fetal period. Each of these stages is important for reaching the ultimate goal of a healthy baby.Jul 22, 2023 · Fetal Development & Fetal Growth Assessment. In the realm of maternal care, understanding and monitoring fetal development and fetal growth are paramount for ensuring the well-being of both the mother and the developing baby. The intricate processes of fetal development, from conception to birth, lay the foundation for a healthy and successful ... The embryonic stage of gestation is the period after implantation, during which all major organs and structures within the growing mammal are formed. Once the embryo is fully formed, it expands, grows and continues to develop into what is known as the stage of fetal development. This is when the mother becomes physically and visibly pregnant. Embryonic Stage (Weeks 5 to 9) Fetal Stage (Weeks 10+) Fetal development is the term used when talking about the procession of events that starts when sperm and egg meet and unfolds in an orderly progression to form a baby. For something that "simply happens" once a woman gets pregnant, it is amazingly complex—and a lot of fun to think about.Radiation effects on embryonic and fetal development are generally considered low risk compared to the normal risks of pregnancy. Most diagnostic x-ray and nuclear medicine examinations are <50 mSv and have not been demonstrated to produce any significant impact on fetal growth and development. For doses up to 100 mSv, any radiation risks are ...By 12 weeks of pregnancy: The fetus fills the entire uterus. By about 14 weeks: The sex can be identified. By about 16 to 20 weeks: Typically, the pregnant woman can feel the fetus moving. Women who have been pregnant before typically feel movements about 2 weeks earlier than women who are pregnant for the first time. There are three stages of fetal development: germinal, embryonic and fetal. Most people don’t talk about their pregnancy in these terms, but it can be helpful to know. Germinal stage. The germinal stage is the shortest stage of fetal development. It begins at conception when a sperm and egg join in your fallopian tube. The sperm fertilizes ...The 3 primary stages of prenatal development are the germinal period, the embryonic period, and the fetal period. Each of these stages is important for reaching the ultimate goal of a healthy baby.Jun 3, 2022 · Fetal development continues during the third trimester. Your baby will open his or her eyes, gain more weight, and prepare for delivery. By Mayo Clinic Staff. The end of your pregnancy is near! By now, you're eager to meet your baby face to face. Your uterus, however, is still a busy place. Here's a weekly calendar of events for fetal ... end of the 2nd week through the 8th week. all vital organs are forming. exposure to teratogens could be fatal. What is the fetal stage of fetal development? end of the 8th week through birth. all major organs are formed so defects are more minor. refinement and development occurs during this stage. The growth and development of the fetus is typically divided into three stages • Preembryonic Stage: Fertilization to 2 to 3 Weeks • Embryonic Stage: 4 to 8 Weeks' Gestation • Fetal Stage: 9 Weeks to Birth. LUNAR MONTH.Much progress has been made over the past decades in the development of in vitro techniques for the assessment of chemically induced effects in embryonic and fetal development. In vitro assays have originally been developed to provide information on the mechanism of action of normal development, and have hence more adequately been used in ... Usually felt at approximately 17-20 weeks. Embryonic Period. Weeks 4 - 8 (conceptual age) and encompasses the period of organogenesis. Organogenesis. The period of development where the organ primordia are established via morphogenesis. Morphogenesis. the development of shape, size, and other features of an organ, or part of the body, or the ... May 13, 2022 · An egg that has been fertilized by a sperm is considered to be in the embryonic stage of development. During this stage, or 1st trimester, the embryo's major organs and structures are formed. The fetal stage of pregnancy begins at week 11. At this stage, the major organs, bones, and other structures continue developing. You also can tell the gender of the baby at this stage of fetal development. Week 1 to Week 8 (GA 10)are considered the embryonic period of development. Week 9 to week 37 (GA 11-39) or birth are considered the fetal period of development. First month (4 weeks) after birth is the neonatal period of development. Abstract. Aquest projecte consisteix en un treball d’investigació sobre el món de la comunicació i la publicitat per conèixer quins són actualment els recursos més emprats i, sobretot, l’ús que fan dels estereotips. Concretament, aquest projecte es focalitza en l’anàlisi, a partir de la semiòtica, dels rols familiars de l’home ... By 12 weeks of pregnancy: The fetus fills the entire uterus. By about 14 weeks: The sex can be identified. By about 16 to 20 weeks: Typically, the pregnant woman can feel the fetus moving. Women who have been pregnant before typically feel movements about 2 weeks earlier than women who are pregnant for the first time.The embryonic period is all about the formation of important systems of the body. Think of it as your baby’s basic foundation and framework. The fetal period, on the other hand, is more about...Jun 3, 2022 · Fetal development takes on new meaning in the second trimester. Highlights might include finding out your baby's sex and feeling your baby move. By Mayo Clinic Staff As your pregnancy progresses, your baby might begin to seem more real. Two months ago, your baby was a cluster of cells. Now he or she has functioning organs, nerves and muscles. An embryo at the end of 7 weeks of development is only 10 mm in length, but its developing eyes, limb buds, and tail are already visible. (This embryo was derived from an ectopic pregnancy.) (credit: Ed Uthman) During the sixth week, uncontrolled fetal limb movements begin to occur.Keep in mind that this is different than the three trimesters of pregnancy. Prenatal Development. Let’s take a look at some of the changes that take place during each of the three periods of prenatal development: the germinal period, the embryonic period, and the fetal period. The Germinal Period (Weeks 1-2) Figure 2. Sperm and Ovum at ConceptionTaken together, these findings clearly indicate that tumors develop over years and decades, during which embryonic cell types directly exposed to a carcinogen may participate in the normal steps of embryonic and fetal development, to eventually differentiate as functional adult cell types. Jul 22, 2023 · a. "The heart chambers are formed in week 5." b. "Cardiac development occurs the most rapidly during weeks 7 and 8." c. "The cardiac system develops faster than the central nervous system." d. "The heart is beating, but the heart chambers don't form during the embryonic period." a. There are three stages of fetal development: germinal, embryonic and fetal. Most people don’t talk about their pregnancy in these terms, but it can be helpful to know. Germinal stage. The germinal stage is the shortest stage of fetal development. It begins at conception when a sperm and egg join in your fallopian tube. The sperm fertilizes ...Pregnancy jargon explained. The difference between an embryo and a fetus has to do with the different phases of baby’s development. “The embryo is defined as the developing pregnancy from the time of fertilization until the end of the eighth week of gestation, when it becomes known as a fetus,” says James A. O’Brien, MD, medical ...The fetal period (9-36 weeks) is about continued differentiation of organs and tissues, most importantly this period is about growth both in size and weight. The long Fetal period (4x the embryonic period) is a time of extensive growth in size and mass as well as ongoing differentiation of organ systems established in the embryonic period and ...Aug 1, 2008 · This period is after embryonic organogenesis is complete; therefore, a 35-day fetus can be recognized as canine. External features characteristic of fetal stages are development of pigmentation, growth on hair and claws, closure and fusion of the eyelids, growth of the external ear, elongation of the trunk, and sexual differentiation [9]. 4.1. Keep in mind that this is different than the three trimesters of pregnancy. Prenatal Development. Let’s take a look at some of the changes that take place during each of the three periods of prenatal development: the germinal period, the embryonic period, and the fetal period. The Germinal Period (Weeks 1-2) Figure 2. Sperm and Ovum at ConceptionGrass-fed animal fats supply vitamins E and K 2; palm oil, fresh fruits and vegetables, nuts, and freshly ground grains are also sources of vitamin E; fermented foods are also sources of vitamin K 2. Leafy greens supply vitamin K 1. Biotin can be obtained from liver and egg yolks.Teratogens may affect the embryo or fetus in a number of ways, causing physical malformations, problems in the behavioral or emotional development of the child, and decreased intellectual quotient (IQ) in the child. Additionally, teratogens may also affect pregnancies and cause complications such as preterm labors, spontaneous abortions, or ...Embryonic Stage (Weeks 5 to 9) Fetal Stage (Weeks 10+) Fetal development is the term used when talking about the procession of events that starts when sperm and egg meet and unfolds in an orderly progression to form a baby. For something that "simply happens" once a woman gets pregnant, it is amazingly complex—and a lot of fun to think about.Study with Quizlet and memorize flashcards containing terms like Developmental psychologists study physical, cognitive, and ________ changes throughout the human life span. A) zygotic B) embryonic C) genetic D) social, Dr. Birkin's major research interest is the development of motor skills in children. It is most likely that Dr. Birkin is a ________ psychologist. cognitive developmental ... An embryo is the early stage of a baby’s development during pregnancy. The first stage is the fertilized egg ( zygote ). It divides to become a blastocyst and travels down the fallopian tube to the uterus, where it may implant to establish the pregnancy. The developing baby is termed an embryo from week five until the end of the 10th week of ...Jun 14, 2021 · Embryonic Stage (Weeks 5 to 9) Fetal Stage (Weeks 10+) Fetal development is the term used when talking about the procession of events that starts when sperm and egg meet and unfolds in an orderly progression to form a baby. For something that "simply happens" once a woman gets pregnant, it is amazingly complex—and a lot of fun to think about. This review article describes key cardiac progenitors involved in embryonic heart development; the cellular, physiological, and anatomical changes during the transition from fetal to neonatal circulation; as well as the unique impact that different pregnancy complications have on cardiac remodeling.Eight weeks into your pregnancy, or six weeks after conception, your baby's lower limb buds take on the shape of paddles. Fingers have begun to form. Small swellings outlining the future shell-shaped parts of your baby's ears develop and the eyes become obvious. The upper lip and nose have formed.The embryonic stage of gestation is the period after implantation, during which all major organs and structures within the growing mammal are formed. Once the embryo is fully formed, it expands, grows and continues to develop into what is known as the stage of fetal development. This is when the mother becomes physically and visibly pregnant.The placenta is a vital organ with multiple functions, such as endocrine, immune, and physiological. The placenta is formed gradually during the first three months of pregnancy, while, after the fourth month, it grows parallel to the development of the uterus. Once completed, it resembles a spongy disc 20 cm in diameter and 3 cm thick. It is a temporary organ, whose genetic characteristics are ...The fetal head is still large as the body straightens out. The arms and legs are formed, and can move and bend. • Sex organs are almost fully formed. • Toenail and fingernail growth begins. • The eyes move forward. The ears reach normal position. Now the face is well formed. Embryonic Fetal DevelopmentEmbryonic development encompasses the period of time at which three germ layers differentiate: ectoderm, mesoderm, and endoderm. Organ systems are formed from these germ layers, with most of the reproductive tract being derived from mesoderm. Organogenesis is complete prior to the fetal stage in canine embryos, but sexual differentiation occurs ...The Fetal Period (Weeks 9-40) The fetal period is the final stage of prenatal development and occurs from the ninth week until birth. During this stage, the developing organism is called a fetus and undergoes a period of maturation, where the organs and body systems continue to develop and mature. During the fetal period, the fetus gains weight ... The average fetus at 15 weeks is 6.6 inches (16.7 cm) long and weighs 4.1 ounces (117 grams) . Gestational Age 16 to 17 weeks (3.7 to 3.9 months) . Fetal Age 14 to 15 weeks. The average 16 week fetus is 7.3 inches (18.6cm) long and weighs 5.2 ounces (146 grams) . Hearing is beginning to form [12].Of those causes, failure of development of conceptuses (embryo and extra-embryonic membranes) during the peri-implantation period is primarily responsible for embryonic losses before day 30 of gestation and inadequate uterine capacity is the major reason for fetal deaths and suboptimal growth after day 30 (Bazer et al. 2009a, b).The placenta is a vital organ with multiple functions, such as endocrine, immune, and physiological. The placenta is formed gradually during the first three months of pregnancy, while, after the fourth month, it grows parallel to the development of the uterus. Once completed, it resembles a spongy disc 20 cm in diameter and 3 cm thick. It is a temporary organ, whose genetic characteristics are ...
Week 1 to Week 8 (GA 10)are considered the embryonic period of development. Week 9 to week 37 (GA 11-39) or birth are considered the fetal period of development. First month (4 weeks) after birth is the neonatal period of development. . Lurie children
The growth and development of the fetus is typically divided into three stages • Preembryonic Stage: Fertilization to 2 to 3 Weeks • Embryonic Stage: 4 to 8 Weeks' Gestation • Fetal Stage: 9 Weeks to Birth. LUNAR MONTH.Fetal development takes on new meaning in the second trimester. Highlights might include finding out your baby's sex and feeling your baby move. By Mayo Clinic Staff As your pregnancy progresses, your baby might begin to seem more real. Two months ago, your baby was a cluster of cells. Now he or she has functioning organs, nerves and muscles.Development of the lower respiratory tract begins on day 22 and continues to form the trachea, lungs, bronchi, and alveoli. The process divides into five stages: embryonic, pseudoglandular, canalicular, saccular, and alveolar stage. Although the process begins early on in fetal development, complete maturation does not take place until the child is approximately 8 years of age. This ...Development of the lower respiratory tract begins on day 22 and continues to form the trachea, lungs, bronchi, and alveoli. The process divides into five stages: embryonic, pseudoglandular, canalicular, saccular, and alveolar stage. Although the process begins early on in fetal development, complete maturation does not take place until the child is approximately 8 years of age. This ...Oct 22, 2021 · The 3 primary stages of prenatal development are the germinal period, the embryonic period, and the fetal period. Each of these stages is important for reaching the ultimate goal of a healthy baby. An egg that has been fertilized by a sperm is considered to be in the embryonic stage of development. During this stage, or 1st trimester, the embryo's major organs and structures are formed. The fetal stage of pregnancy begins at week 11. At this stage, the major organs, bones, and other structures continue developing. You also can tell the gender of the baby at this stage of fetal development.A. Trophoblast = outer covering of cells (just beneath the zona pellucida) o This will become the chorion, which forms the fetal. portion of the placenta. B. Inner Cell Mass (ICM) = cells concentrated in one portion of the inner cavity. o These cells will contribute to the formation of the. embryonic body. C. Blastocoele = internal fluid-filled ...During embryonic and fetal development much of the skeleton initiates as a cartilaginous scaffold, which is progressively resorbed and replaced by bone. Endochondral bone formation continues until the growth plates fuse during puberty. At all life stages adequate delivery of mineral is required for …During fetal development, hematopoiesis occurs in multiple waves throughout the developing embryo and fetus, including extraembryonic yolk sac (YS), the para-aortic region of the embryo, fetal liver, and placenta before eventually homing to the bone marrow where it occurs just before birth.Heat stress can disrupt early embryonic development. Effects of heat stress on embryonic survival decrease as embryos advance in development. Heat stress at day 1 or days 1–3 after breeding decreases embryonic survival. In contrast, superovulated cows appear to be more resistant to heat stress in terms of early pregnancy. The fetal period (9-36 weeks) is about continued differentiation of organs and tissues, most importantly this period is about growth both in size and weight. The long Fetal period (4x the embryonic period) is a time of extensive growth in size and mass as well as ongoing differentiation of organ systems established in the embryonic period and ...Oct 22, 2021 · The 3 primary stages of prenatal development are the germinal period, the embryonic period, and the fetal period. Each of these stages is important for reaching the ultimate goal of a healthy baby. Prenatal development in humans is divided into 2 periods: an embryonic period and a fetal period. The embryonic period begins with fertilization and ends 8 weeks later, and the fetal period extends from that point onwards until delivery. Since 1914, the staging of human embryos in the first 8 weeks has been divided into 23 Carnegie stages, with ...Study with Quizlet and memorize flashcards containing terms like A woman says, "My husband and I will be trying to have a baby soon." Which statement by the woman demonstrates an understanding of the growth that occurs during the embryonic period?, A woman at 8½ weeks' gestation presents for a prenatal check-up. She is eager to find out the baby's sex. Which response by the nurse best ....