alleryMenstruation usually lasts:
A9 to 14 days
B20 to 28 days
C3 to 7 days
D1 to 2 days
Answer & Solution
Correct answer: C. 3 to 7 days
1. The thick uterine lining is shed when no zygote arrives.
2. The shedding takes a few days.
3. Menstruation usually lasts 3 to 7 days.
4. So the answer is 3 to 7 days.
_Source: syllabus Science, Ch 11 'Reproduction: How Life Continues'_
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