The menstrual cycle in normal adult woman is of
$48$ days
$38$ days
$18$ days
$28$ days
No new follicles develop in the luteal phase of the menstrual cycle because
Secretion of progesterone by corpus luteum is initiated by
The substance secreted by the corpus luteum is
The rupture of the graafian follicle and the release of ovum occurs under the influence of
Ovulation takes place in/on