t Fetal cortisol (+) t Placental CRH t Placental estrogens (+ Progesterone action) t Prostaglandin and oxytocin receptors on uterus t Prostaglandins (from placenta) (+) (+) Stimulates uterus to contract t Oxytocin releas from mother's posterior pituitan

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Explain the parturition reflex:
† Fetal CRH
† Fetal cortisol
(+)
t Placental CRH
↑ Placental estrogens
(+ Progesterone action)
t Prostaglandin
and oxytocin
receptors on
uterus
t Prostaglandins
(from placenta)
(+)
(+)
Stimulates uterus
to contract
t Oxytocin release
from mother's
posterior pituitary
Cervix stretches
Transcribed Image Text:Explain the parturition reflex: † Fetal CRH † Fetal cortisol (+) t Placental CRH ↑ Placental estrogens (+ Progesterone action) t Prostaglandin and oxytocin receptors on uterus t Prostaglandins (from placenta) (+) (+) Stimulates uterus to contract t Oxytocin release from mother's posterior pituitary Cervix stretches
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