In essence, the Pill works by tricking the body into thinking it’s already pregnant. It does this by manipulating the normal hormonal feedback system. The end result is that the body doesn’t release the hormones necessary to stimulate the ovary to release an egg. As a back-up, every other facet of the woman’s reproductive system [...]

Most ova probably survive about six to twelve hours after ovulation. However, for the purposes of contraception, you must count on a 24-hour survival period, plus an additional 24 hours in case there is a multiple ovulation.

It’s fairly unusual to be pregnant and still have a normal period. This is because the very thing that causes women to menstruate is the drop in progesterone that occurs only if fertilization does not happen. If a woman were pregnant, her progesterone levels would remain high, thus preventing her from having a period. Of [...]

The answer lies in the wording of the question. More precisely, it is essentially impossible for a woman to get pregnant during her period, but on rare occasions it is possible for a woman to get pregnant from intercourse during her period. Since sperm can live for five days, a couple could have sex near [...]

The answer to this question is somewhat tricky. The general answer is that most women are fertile for only a few days per cycle. However, there are several factors to consider: 1. The woman’s egg can only live up to 24 hours. Two or more eggs may be released over a maximum of 24 hours. [...]