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In periodic abstinence, couples avoid coitus on which days?

ADay 20 to 17
BDay 20 to 27
CDay 10 to 17
DDay 10 to 27
Answer & Solution
Correct answer: C. Day 10 to 17
1. Ovulation is expected in that window. 2. Chances of fertilisation are very high then. 3. The window is day 10 to 17 of the cycle. _Source: syllabus Biology, 'Reproductive Health' (2020-21 printing)_
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