There are a number of factors that determine how long a sperm will remain alive in the vagina after ejaculation. Depending on the conditions of the vagina, sperm can live for up to five days inside a woman’s body.
This means that if you have unprotected sex a few days before ovulation occurs; there is a chance that sperm will still be alive and will be able to fertilize the egg at this point. One factor to keep in mind is the fact that male sperm do not live as long as female sperm. Because of this, it is more likely that a woman will become pregnant with girl from sperm that has been in her body for a few days.
Most of the time there are 100 million sperm present when a man ejaculates. For those who have fewer than 20 million sperm present, they may have issues with infertility and may need to do a little bit extra to raise the count so that they have a better chance of their partner becoming pregnant.
Remember, it only takes one sperm to reach an egg and fertilize it. However, with the millions of sperm that are present, there are millions that do not make the connection. For this reason, it is important that the sperm is healthy and plentiful when you are looking to conceive with your partner.