What is periodic abstinence?

Explanation

**Step-by-Step Solution:**

1. **Definition of Periodic Abstinence**: Periodic abstinence is a natural contraceptive method aimed at preventing pregnancy by avoiding sexual intercourse during certain times in a woman's menstrual cycle.

2. **Understanding the Menstrual Cycle**: The menstrual cycle typically lasts about 28 days, and it includes various phases: the follicular phase, ovulation, and the luteal phase. Ovulation usually occurs around the 14th day of the cycle.

3. **Fertile Period Identification**: The days leading up to and following ovulation are considered the most fertile days. This is because the ovum (egg) is available for fertilization, and sperm can survive in the female reproductive tract for about 2-3 days.

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