Biology Reproduction NUMS 2023
PMDC Verified Question 35 of 81
Which hormone induces labour pain?
A
Estrogen
B
Oxytocin
C
Progesterone
D
LH
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Oxytocin
Concept:

Parturition (childbirth) relies on a powerful positive feedback loop driven by smooth muscle contraction.

Solution:

  • During labor, pressure on the cervix sends nerve impulses to the mother's brain.


  • The posterior pituitary gland responds by releasing large bursts of oxytocin.


  • Oxytocin stimulates the myometrium (uterine muscle) to contract powerfully. These intense muscular contractions are perceived as labor pains.


Why other options are incorrect:

Progesterone maintains pregnancy and actually inhibits uterine contractions. Estrogen prepares the uterus but does not cause acute labor pains. LH triggers ovulation.

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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