The human menstrual cycle generally repeats every_days.
Correct answer: C. 28
- A. 26
- B. 27
- C. 28
- D. 29
Explanation
The human menstrual cycle generally averages 28 days, although it can vary from person to person. Option C is correct as 28 days is the standard. Options A, B, and D are incorrect because they do not match the typical average cycle length. Variations can occur, but the median cycle length is typically used as a reference.
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About Reproduction
Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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