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The onset of pregnancy, marked by implantation of the blastocyst into the endometrium (the lining of the uterus).

A bacterial infection/STI, transmitted when someone touches a sore on a person who has syphilis. These sores are can be on the mouth, penis, vagina, anus or skin. It requires medical treatment.

Reproductive glands of people with penises. They sit outside the body and are contained within the scrotum.