Biology Reproduction ETEA 2023 Retake
PMDC Verified Question 38 of 81
At the beginning of the menstrual phase, the ____ are at the lowest level.
A
Follicle stimulating hormone
B
Gonadotropins
C
Ovarian hormones
D
None of these
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Ovarian hormones
Concept:

Menstruation is triggered by the withdrawal of hormonal support for the endometrial lining.

Solution:

  • If fertilization does not occur, the corpus luteum degenerates at the end of the secretory phase.


  • This degeneration causes a dramatic crash in the levels of ovarian hormones (both estrogen and progesterone).


  • It is precisely this bottoming out (lowest level) of ovarian hormones that triggers the shedding of the uterine lining, marking the beginning of the menstrual phase (Day 1).


Why other options are incorrect:

Because ovarian hormones drop, the negative feedback is lifted, meaning FSH (a gonadotropin) is actually beginning to slowly rise at the start of menstruation to prepare the next cohort of follicles.

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.

Previous Question All Reproduction MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App