Question:
The method of "Periodic Abstinence" is based on which physiological fact?
The method of "Periodic Abstinence" is based on which physiological fact?
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The fertile period during which couples should abstain from coitus is typically considered to be from day 10 to day 17 of the menstrual cycle, when the chances of fertilization are extremely high.
Updated On: Jun 3, 2026
- Ovum remains viable for about 1-2 days.
- Sperm survive for about 3 days.
- Ovulation occurs around the 14th day of the cycle.
- All of the above facts combined.
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
The question asks to identify the physiological principles and facts that form the basis of the "Periodic Abstinence" natural family planning method.
Step 2: Detailed Explanation:
• Periodic abstinence (or the rhythm method) is a natural method of contraception where couples avoid or abstain from sexual intercourse during the fertile period of the menstrual cycle to prevent fertilization.
• This method relies on several interrelated physiological facts of human reproduction:
• Timing of Ovulation: In a standard 28-day menstrual cycle, ovulation (the release of a mature egg from the ovary) typically occurs around day 14. Days 10 to 17 are generally considered the "fertile window" because of cycle variability.
• Viability of the Ovum: Once released, the ovum remains viable and capable of being fertilized for a relatively short duration, approximately 24 to 48 hours (1--2 days).
• Viability of Sperm: After ejaculation into the female reproductive tract, sperm can remain viable and fertilizing-capable for up to 72 hours (3 days).
• Therefore, to avoid pregnancy, coitus must be avoided during any period where viable sperm could encounter a viable egg. This safety window spans from a few days before ovulation (due to sperm lifespan) to a couple of days after ovulation (due to egg lifespan).
• Since all three physiological criteria play a vital role in determining this unsafe fertile period, the method is based on all these facts combined.
Step 3: Final Answer:
The method of periodic abstinence is based on all of the given physiological facts combined.
The question asks to identify the physiological principles and facts that form the basis of the "Periodic Abstinence" natural family planning method.
Step 2: Detailed Explanation:
• Periodic abstinence (or the rhythm method) is a natural method of contraception where couples avoid or abstain from sexual intercourse during the fertile period of the menstrual cycle to prevent fertilization.
• This method relies on several interrelated physiological facts of human reproduction:
• Timing of Ovulation: In a standard 28-day menstrual cycle, ovulation (the release of a mature egg from the ovary) typically occurs around day 14. Days 10 to 17 are generally considered the "fertile window" because of cycle variability.
• Viability of the Ovum: Once released, the ovum remains viable and capable of being fertilized for a relatively short duration, approximately 24 to 48 hours (1--2 days).
• Viability of Sperm: After ejaculation into the female reproductive tract, sperm can remain viable and fertilizing-capable for up to 72 hours (3 days).
• Therefore, to avoid pregnancy, coitus must be avoided during any period where viable sperm could encounter a viable egg. This safety window spans from a few days before ovulation (due to sperm lifespan) to a couple of days after ovulation (due to egg lifespan).
• Since all three physiological criteria play a vital role in determining this unsafe fertile period, the method is based on all these facts combined.
Step 3: Final Answer:
The method of periodic abstinence is based on all of the given physiological facts combined.
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