Sperm can survive inside a woman's body for up to 5 days. This survival depends on favorable conditions such as the presence of fertile cervical mucus, which protects the sperm and facilitates its movement toward the egg. Typically, sperm live about 3 to 5 days within the cervix, uterus, and fallopian tubes after ejaculation, providing a window when fertilization can occur if ovulation happens during this time.

Details on Sperm Survival

• Sperm lifespan inside the female reproductive tract can range from a few hours to up to 5 days under optimal conditions.
• The acidic environment of the vagina makes survival challenging, but around ovulation, cervical mucus changes in consistency to protect sperm and support their longevity.
• Sperm may be stored temporarily in cervical crypts and released over time, increasing the chance of fertilization.
• Outside the body or on dry surfaces, sperm only live minutes before dying.

This 5-day potential survival is why intercourse within several days before ovulation can result in pregnancy.