Question

LH surge occurs during

• A. Menstrual phase
• B. Beginning of proliferative phase
• C. Just before end of proliferation phase
• D. At the middle of the cycle

Answer 1

The correct option is D At the middle of the cycle

Menstrual cycle starts with the menstrual flow (menses), this is followed by follicular phase. During this phase secretion of gonadotropins (LH and FSH) and estrogens. In the middle of the cycle, rapid secretions of LH and FSH increases leading to LH surge and hence ovulation. Ovum lasts for 24 hours only. It is followed by the luteal phase during which the remaining parts of Graafian follicle changes into corpus luteum.

So, the correct option is 'At the middle of the cycle'.