No, you don’t have a period (menstruate) when you’re pregnant. During pregnancy, the egg is fertilized and has attached (implantation) to the lining of the uterus. Some people have spotting (a small amount of blood come out the vagina) when they’re pregnant. This is from hormones causing a small amount of bleeding from the uterus. It’s different from a period where the uterine lining is shed. If a pregnant person has blood come from the vagina, see a health care provider. If it’s enough to soak a pad in an hour or less, go to emergency department of a hospital.