Chapter 7- Placenta and Fetal Membranes Flashcards
4 fetal membranes
chorion
amnion
allantois
umbilical vesicle
Decidua
endometrium of a pregnant person
Amniochorionic membrane
fused amnion and chorion
Placental functions
metabolism transport endocrine secretions protection excretion
placental metabolites
glycogen
cholesterol
fatty acids
placenta transports..
glucose gasses viruses amino acids electrolytes antibodies unconjugated steroid hormones few protein hormones
hCG
human chorionic gonadotropin
hCS
human chorionic somatomammotropin
aka. human placental lactogen
placental endocrine secretions
hCG hCS hCT estrogen progesterone
hCT
human chorionic thyrotropin
transcytosis
transport of IgGs from pregnant person to fetus
**no pertussis or varicella transmission
Early neonatal period
birth-7 days
late neonatal period
7-28 days
superfecundation
fertilization of 2+ oocytes at different times
RARE
functions of amniotic fluid
allows symmetric growth barrier cushion promotes lung development prevents fusion of amnion with embryo/fetus allows for movement helps control body temperature
Placental abnormalities
placenta previa
placenta accreta
placenta percreta
3 stages of labor
dilation (7-12 hours)
expulsion (20-50 minutes)
placental stage (~15 minutes)
parturition
process of expelling fetus, placenta, and fetal membranes from reproductive tract
preeclampsia symptoms
hypertension edema proteniuria may cause convulsions can lead to miscarriage or death
preeclampsia causes
poor EVT-cell invasion –> poor placental perfusion –> production of toxins –> toxins attack maternal vasculature, specifically renal glomeruli
