Can you get pregnant one day before ovulation?

Yes, you can get pregnant one day before ovulation. Here are some key points to consider:

Fertile Window

The fertile window, during which conception is most likely, includes the five days leading up to ovulation, the day of ovulation itself, and the day after ovulation. This is because sperm can survive in the female genital tract for up to 5 days, while the egg is viable for about 12-24 hours after it is released245.

Probability of Conception

The likelihood of getting pregnant is particularly high in the days immediately before ovulation. Specifically:

• The probability of conception is around 41% one day before ovulation4.
• Other studies also indicate high chances of conception in the days leading up to ovulation, with percentages such as 21% one day before ovulation and higher percentages in the preceding days14.

Timing and Sperm Survival

Since sperm can survive for up to 5 days, having intercourse one day before ovulation increases the chances that viable sperm will be present when the egg is released245.

In summary, having sex one day before ovulation is a highly fertile time and significantly increases the chances of getting pregnant.