NEET BIOLOGY

Detailed explanation-1: -The length of the menstrual cycle varies from woman to woman, but the average is to have periods every 28 days. Regular cycles that are longer or shorter than this, from 23 to 35 days, are normal. The menstrual cycle is the time from the first day of a woman’s period to the day before her next period.

Detailed explanation-2: -Your menstrual cycle is the time from the first day of one period to the first day of your next period. So if you have a 28-day cycle, it takes 28 days to get from the beginning of one period to the beginning of the next.

Detailed explanation-3: -The human menstrual cycle is only the about same length as the lunar month – it isn’t synchronised with a particular phase. Charles Darwin thought that the 28-day human menstrual cycle was evidence that our ancestors lived on the seashore and needed to synchronise with the tides.

Detailed explanation-4: -This series of hormone-driven events is called the menstrual cycle. During each menstrual cycle, an egg develops and is released from the ovaries. The lining of the uterus builds up.