P, Q, R and S are representing the hormone titres in the menstrual cycle starting from day one.

Which hormone is responsible for ovulation?

Question

P, Q, R and S are representing the hormone titres in the menstrual cycle starting from day one. Which hormone is responsible for ovulation?

TestHub · Accepted Answer

Q = Luteinizing hormone (LH). It shows LH surge (peak concentration of LH) during the mid-cycle $\to$ Rupture of Graafian follicle and release of an ovum (ovulation),
P = Follicle Stimulating Hormone (FSH) mid-cycle peak, lower than LH peak,
R = Estrogen (hormone having double peaks), and
S = Progesterone (single peak in second half).

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