For how long is an ovum capable of being fertilized after ovulation?

An ovum, once released from the ovary during ovulation, has a limited timeframe during which it can be fertilized. This window is generally considered to be about 12 to 24 hours after ovulation occurs. While some sources may suggest that an ovum could be capable of being fertilized up to around 36 hours post-ovulation, the most widely accepted timeframe is up to 24 hours.

This timeframe is critical because if an ovum is not fertilized within this period, it will begin to degrade and will not be able to lead to conception. In contrast, sperm can survive for several days in the female reproductive tract, which allows for a broader window of time for fertilization to occur in relation to when intercourse takes place.

Therefore, while the 24 to 36-hour period captures the essence of the ovum’s viability, the 24-hour mark is the most accurate and recognized timeframe for viable fertilization post-ovulation. This understanding is fundamental in reproductive health and can aid in family planning and understanding fertility cycles.