Generally not pregnant, but the survival time of sperm in different environments is:

The survival time of motile sperm in 1 and 37℃ environment: more than 4 ~ 8 hours;

2. The survival time of sperm in vagina: 0.5 days;

3. Survival time of active sperm in cervix: 2 ~ 8 days;

4. Survival time of motile sperm in uterus and fallopian tube: 2 ~ 2.5 days.

5. If the temperature is lowered, sperm can survive for several weeks; If frozen with liquid nitrogen, sperm can survive longer and even be preserved for a long time.

Then even if you are menstruating, you may be pregnant! It's just a low chance!