Biology Reproduction UHS 2024
PMDC Verified Question 23 of 81
Which one of the following hormones is responsible for the labor pains in human female at the time of birth of baby?
A
Estrogen
B
Progesterone
C
Oxytocin
D
Corticosteroid
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Oxytocin
Concept:

Labor requires the sudden, forceful activation of uterine musculature via neuroendocrine signals.

Solution:

  • As a pregnancy reaches full term, the posterior pituitary releases massive amounts of the peptide hormone oxytocin.


  • Oxytocin acts directly on the myometrium of the uterus, initiating intense, wave-like contractions to push the fetus toward the cervix.


  • These violent muscular contractions are the direct physiological cause of labor pains.


Why other options are incorrect:

Estrogen upregulates oxytocin receptors but doesn't cause the contractions directly. Progesterone actively prevents contractions. Corticosteroids are involved in fetal lung maturation and maternal stress, not the immediate induction of mechanical labor.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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