Question

What is the difference between menstrual cycle in monkeys and humans??

Answer 1

Cyclical changes in ovaries, accessory reproductive ducts and hormones in primates during reproductive phase is called menstrual cycle. Primates can copulate in any season.

• The menstrual cycle for humans is 28 days and the menstrual cycle for chimpanzees is 35 days, gorillas is 30 days.
• In humans menarche occurs at about 12 years, in monkeys it starts at about 4 years and in other monkeys it occurs at about 6 years.
• Duration of cycle is 3-5 days in humans, about 14 days in chimpanzees and 2-3 days in gorillas.