NEET BIOLOGY

Detailed explanation-1: -They are the periodic (rhythmic) changes that occur once about every lunar month (28 days) in the female reproductive organs (ovary and uterus) during the reproductive (fertile) period from puberty (11-14 years) until menopause (40-45 years).

Detailed explanation-2: -Cycle length generally ranges from 23 to 34 days; the average is reported as approximately 27-29 days [55, 59]. Longer and more irregular cycle intervals are associated with seasonal reproductive quiescence and nonovulatory cycles [55]. Ovulation occurs from either ovary in a random fashion [55].

Detailed explanation-3: -Days 25-28 If the egg was not fertilized or implantation does not occur, hormonal changes signal the uterus to prepare to shed its lining, and the egg breaks down and is shed along with lining. The cycle begins again on Day 1 menstrual bleeding.

Detailed explanation-4: -Ovulation is the release of an egg from the ovaries. A woman is born with all her eggs. Once she starts her periods, 1 egg develops and is released during each menstrual cycle.