Card 116 / 121: How many stages of human parturition are there in reference to pregnancy?
A)
1
B)
2
C)
3
D)
4
Answer:
D) 4
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Phase 1: Preparation for labour (activation). Uterotrophins= prostaglandins, oxytocin receptor, relaxin. Uterus is changing. Stage of Braxton-Higgs contractions.
Phase 2: Active labour (stimulation). Uterotonins= oxytocin, prostaglandins. Escalates rapidly under Ferguson reflex.
Phase 3: Involution. Uterotonins=oxytocin, prostaglandins. Uterus contracts down. Large womb is closed up. Tissue remodelling.
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