Correct option:(D) All of these

Solution:

• Gamete formation in females is a cyclic activity that takes about 28/29 days.
• It involves changes in the structure and function of the entire reproductive system.
• It is called menstrual cycle.
• It occurs only in primates( monkeys, chimpanzees and human beings).
• The latter do not show a cyclic change in sex urge and permit copulation at any time in the menstrual cycle.
• Human female may accept a male at any time, though there is variation in her level of desire.