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Estrogen f/x
suppresses FSH & LH release from anti-pituitary gland via neg. feedback which prevents ovulation
not needed bc body is already attempting to support an existing pregnancy
induces fetal growth
stims maternal growth tissue ~ uterus and mammary glands enlarge
Progesterone f/z
needed to sustain pregnancy
assists in implantation by thickening wall
prevents premature labor & miscarriage
nutrient secretion for early embryo
hCG f/x
thickens uterine lining
stops menses
stims progesterone release
x