Practicing safe sex can reduce your chances of contracting a sexually transmitted infection and getting pregnant.
occurs when a penis enters a vagina(32). When this happens, a fluid called semen can be injected from the penis into the vagina. Semen is made up of sperm cells(32). If contraception is not used, these sperm travel up the vagina and into the uterus, then into the fallopian tubes, and can lead to pregnancy(79).