In human reproduction, a sudden rise in LH causes:
Correct answer: B. Ovulation
- A. Menstrual flow
- B. Ovulation
- C. Fertilization to form zygote
- D. Implantation of embryo
Explanation
The mid cycle surge of LH from the anterior pituitary causes the mature follicle to rupture and release the egg, which is ovulation. Menstrual flow follows the fall in progesterone at the end of the cycle, and fertilisation and implantation come after ovulation rather than being caused by LH.
This question appeared on the UHS MDCAT 2026 paper, which you can sit online with every answer explained.
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About Menstrual Cycle
The menstrual cycle covers the coordinated changes in the ovaries and uterus, including menstruation, follicular growth, ovulation and corpus luteum formation. It links follicle-stimulating hormone, luteinizing hormone, oestrogen and progesterone with endometrial changes, and distinguishes the ovarian cycle from the uterine cycle and the hormonal events of pregnancy.
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Which of the following hormones is produced by Corpus Luteum?
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The fertile time in the menstrual cycle is from:
If the corpus luteum degenerates prematurely, the most likely outcome is:
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