Question

In the 28 days human ovarian cycle, the ovulation takes place typically on
A. day 1 of the cycle.
B. day 14 of the cycle.
B. day 5 of the cycle.
D. day 28 of the cycle.

Answer 1

Ovarian cycle is the event of menstrual cycle which take place in ovaries, menstrual cycle start after attaining puberty in female, in which follicular, ovulation and luteal phase are take place. Onset of menstrual cycle is known as menarche and offset of menstrual cycle marked as menopause.

Complete answer:
Ovulation is the rupturing of mature Graafian follicle which is released in ovulation, it is the second phase of ovarian cycle and it occurs around 14 of a 28- day menstrual cycle. This process is stimulated by a rising level of luteinizing hormone (LH) in blood from the pituitary gland. The surge in LH starts around the 12th day of the cycle and lasts for two days.

Menstrual cycle is the natural change in the female reproductive system in every month of the year, until menopause starts. Day 1 is started when bleeding begins from the uterus, bleeding occurs due to shedding of the uterus endometrium wall. Ovarian cycle is divided into three phases such as follicular phase, ovulation phase and luteal phase.

In the follicular phase it is marked as the first phase and lasts for 12 to 14 days of the cycle, in this phase ovarian follicles are stimulated to begin the maturation, one called graafian follicle. Follicle maturation occurs due to FSH hormone.

Ovulation phase:- in this phase mature graafian follicle rupture and release egg, this is influenced by LH hormone.

Luteal phase:- it is marked as the third phase of the ovarian cycle and it lasts about 14 days and under the influence of FSH and LH graafian follicle release the egg to transform into corpus luteum.

Hence, the correct answer is option (B).

Note: Menstrual cycle events take place in the uterus which make up the uterine cycle. In which the endometrial layer is replaced by the new one and this uterine cycle consists of three phases such as menstruation, proliferative phase and secretory phase, these phases play different roles in the cycle.