NURS 323 Lecture Notes - Lecture 18: Organogenesis, Obstetrics, Trophoblast
28 Jan 2021
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Sogc: society of obstetrics and gynecology in canada. 6-10 days after fertilization: zygote attaches to the uterine wall. Trophoblast: becomes the placenta and thickens the endometrium for implantation by releasing enzymes. Pre-embryonic stage: the first 10-12 days post fertilization, from conception to the establishment of fetal membranes baby is known as a zygote at this time. Week 4: spinal cord formation and buds which will later be external body parts begin to. Week 8: organogenesis complete, genital formation and facial features begin to be present develop. Fetal stage begins 9 weeks after fertilization or 11 weeks gestation and ends at birth embryo now becomes a fetus. Week 12: fetal movements, early reflexes, urine production, finger and toe buds, fetal heartbeat can be auscultated with doppler. Week 16: can auscultate the heart with a stethoscope. Week 20: brown adipose tissue formation, feel fetal fluttering/movement, hair growth, meconium formation, passive antibody transfer.
