The egg cell in cattle remains viable for how many hours after it is released if not fertilized?

The viability of the egg cell, or oocyte, after ovulation is critical for successful fertilization in cattle. In cows, the egg cell typically remains viable for approximately 12 to 24 hours post-ovulation. This means that if fertilization does not occur within this timeframe, the oocyte will degenerate and cannot be fertilized.

With the options provided, the correct choice is based on the average lifespan of the egg after it is released. While various factors may influence this timeframe, the consensus in animal reproduction science suggests that the viability of the egg is best approximated at around 12 hours. This aligns with the physiological processes governing ovulation and fertilization in cattle.

Understanding the egg's viability is crucial for effective breeding strategies, as it emphasizes the importance of timing insemination relative to the observed signs of heat or estrus in cows. Recognizing that the egg is only viable for a limited time helps producers optimize their breeding programs and improve reproductive efficiency in their herds.