The average length of a complete menstrual cycle in human females is about
Correct answer: C. 28 days
- A. 14 days
- B. 21 days
- C. 28 days
- D. 35 days
Explanation
Counting from the first day of one menstruation to the day before the next gives roughly 28 days, though normal cycles vary between about 21 and 35. Fourteen days is only the average time from menstruation to ovulation.
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About Human Reproductive System
The human reproductive system includes the male and female organs that produce gametes, secrete sex hormones and support fertilization and development. Questions cover the testes, ovaries, reproductive ducts, menstrual and ovarian cycles, ovulation, fertilization, implantation, placenta formation and the roles of FSH, LH, oestrogen, progesterone and testosterone.
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