Pregnant women can't have periods, but spotting around the time a period is due is not uncommon. Implantation bleeding occurs 10 to 14 days after conception, which is usually around the time a woman would expect to have ... More »

According to the American Pregnancy Association, a woman who is pregnant sometimes experiences light or irregular bleeding, but it is not actually her period. This bleeding is not as substantial as the bleeding that occu... More »

According to WebMD, it is possible for a woman to get pregnant while on her period. However, experts conclude that it is not very likely for this to happen. For a woman to get pregnant on her period, she would have to ha... More »

Many women may immediately assume that they are pregnant after missing a period for 17 days, but a late period can be caused by a number of circumstances and is not altogether uncommon, according to WebMD. These factors ... More »

A woman's period can be delayed for an undetermined period of time and for a number of reasons, according to the Mayo Clinic. Several factors can cause a delayed period. The most common reason is pregnancy. More »

According to the Plan B website, most women get their next period on time or earlier than expected after taking Plan B. Taking Plan B multiple times during a cycle can cause menstrual changes, including delaying your per... More »

According to Columbia University, it is rare, but possible, for a woman to menstruate when she is pregnant. In a very few cases, a woman's menstrual cycle may continue throughout the first trimester of pregnancy. More »