After ejaculation sperm remain alive for:

Appeared in: IGNOU PB Bsc Entrance-2022

Explanation

Sperm can survive in the female reproductive tract for a significant duration, which creates a fertile window spanning several days before ovulation.
The typical lifespan of sperm after ejaculation into the female genital tract is 48 to 72 hours (2 to 3 days).
Under optimal conditions, particularly in the presence of fertile cervical mucus, sperm survival can be extended for up to 5 days.
Among the given choices, 72 hours is the most accurate answer representing the upper limit of the typical viability period.

Option A: This duration is too short. A 24-hour lifespan is characteristic of the ovum (egg) after ovulation, not the sperm.
Option B: While sperm are certainly viable for 48 hours, this represents the lower end of the typical range (48-72 hours). Viability often extends beyond this point.
Option D: A lifespan of 96 hours (4 days) is possible, but only under highly optimal conditions. It is not the typical or average survival time, making 72 hours a better general answer.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Sperm viability and fertilization as background academic context rather than a clinical decision trigger.
Understanding sperm and ovum viability is fundamental for patient education on family planning, both for achieving conception and for contraception (e.g., natural family planning methods).
Nurses use this knowledge to counsel couples on the timing of intercourse to maximize the chances of pregnancy, explaining that the 'fertile window' opens several days before ovulation due to sperm's longevity.
What if? If the question asked for the lifespan of the ovum after ovulation, the correct answer would be 12-24 hours, highlighting the much shorter window for fertilization from the female gamete's perspective.

How to Approach the Question

This is a factual recall question testing knowledge of reproductive physiology.
Identify the core concept: the lifespan of sperm in the female reproductive tract after ejaculation.
Recall the typical viability period for sperm, which is generally cited as 2-3 days (48-72 hours), with a maximum of up to 5 days under ideal conditions.
Compare this recalled fact with the given options: 24, 48, 72, and 96 hours.
Eliminate 24 hours as it's too short and more aligned with the ovum's lifespan.
Eliminate 96 hours as it represents the higher end of possibility, not the typical duration.

Concept Tested & Keywords

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E6 Physiology Guyton 4SAE Part 3 pp. 49-51, 20-22

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