According to BabyCenter, it is possible but extremely unlikely for a woman to get pregnant on the first day of her menstrual period. Ovulation, the time when conception can occur, usually happens around day 12 to 16 of a... More »

It is extremely unlikely to become pregnant three days before one's period, according to WebMD. Pregnancy can only occur during ovulation, which happens around 14 days after the last period. However, every woman's menstr... More »

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A woman is most likely to get pregnant seven to 10 days after her period ends, notes WebMD. This is the time period when ovulation typically occurs. However, this time period can vary. More »

If a woman has an average 28 day menstrual cycle, it is possible for her to get pregnant 5 days after her period ends. According to WebMD, sperm can live in a woman's body for up to 6 days. A woman that has sex five days... More »

To calculate the date of conception, a woman with regular menstrual periods counts 11 to 21 days from the first day of her last cycle, according to the American Pregnancy Association. Since most women do not know the exa... More »

A woman can estimate a pregnant woman’s due date by using an ultrasound test, measuring the size of the uterus and determining the first day of the woman’s last menstrual period, states WebMD. Most women’s due dates are ... More »

The most common method of calculating a due date takes the first day of a woman's last menstrual period, adds seven days, and counts backward three months, according to WebMD. A woman can also estimate her due date by ad... More »