The lifespan of sperm inside a woman’s body is under debate, but experts agree that it depends on cervical mucus, which provides the sperm with the nutrients and the medium they need to survive during their journey to the ovum. Sperm can be damaged by the vagina’s natural acidity which protects against foreign bacteria, but in the right conditions, sperm can even live up to 5 or 6 days in your body after intercourse. This is an incredible feat compared to the brief lifespan of a mere few hours when no cervical mucus is present. In addition, a couple older studies suggest that the lifespan of sperm within a woman’s body also depends on the type of natural flora that’s present in the reproductive tract.