BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Progesterone and FSH levels remain low in the follicular phase until just before ovulation. At this time, a small FSH surge accompanies the greater LH surge, and progesterone levels rise slightly just before ovulation (Fig.

Detailed explanation-2: -After ovulation the ruptured follicle forms a corpus luteum that produces high levels of progesterone (luteal phase). Towards the end of the cycle the corpus luteum breaks down, progesterone production decreases and the next menstrual cycle begins as follicle stimulating hormone levels start to rise again.

Detailed explanation-3: -Conclusions: The initial FSH rise in the cycle occurs consistently 4 days before menses, is related to a drop in estrogen levels, and is not affected by reproductive ageing.

Detailed explanation-4: -These studies showed that the effect of progesterone administered for periods of 1 to 6 h enhanced the secretion of LH and FSH whereas progesterone administered for periods beyond 12 h inhibited FSH and LH release by dispersed pituitary cells in culture.

Detailed explanation-5: -In women, FSH helps control the menstrual cycle and stimulates the growth of eggs in the ovaries. FSH levels in women change throughout the menstrual cycle, with the highest levels happening just before an egg is released by the ovary. This is known as ovulation.