Ch 29- Labor

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1

Initiation

estrogen levels reach a peak, fetal cell produce oxytocin

2

Oxytocin

and estrogen levels peak resulting in initiation, this hormone is stimulated by uterus for receptors

3

Fetal cells produce oxytocin

induce placenta release prostaglandin, increase uterine contraction

4

Uterine contraction

cause stress release of oxytocin from pituitary

5

Prostaglandin

induce placenta release

6

Dilation Stage

stage 1

7

Expulsion Stage

stage 2; full dilation to deliver

8

Placental stage

stage 3; delivery of placenta