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STD 12 - 3. reproductive health — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 3. reproductive health1 Mark
MCQ
Periodic abstinence is avoiding sex during
  • A
    Luteal phase
  • ✓
    Ovulatory phase
  • C
    Menstrual phase
  • D
    None of these
✓

Answer

Correct option: B.
Ovulatory phase
b
Avoid sex in ovulatory phase. Probable ova releasing day is $12-14$ day of menstrual phase, and sperm can live for $2-3$ days in female reproductive system. So, $10-17\; days$ are the most probable days for fertilisation. Draw backs of periodic abstinence The effectiveness of this method is limited because only a few women have regular menstrual cycle and the actual time of ovulation can not be produced as the ovulation in humans occurs about $14 \;days$ before the onset of the next menstruation

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