Why do people still get there period even though they are pregnant?

People typically do not get their period during pregnancy because hormonal changes prevent ovulation and the shedding of the uterine lining. However, some individuals may experience light bleeding or spotting in early pregnancy, often referred to as implantation bleeding, which can be mistaken for a period. This bleeding is usually much lighter and shorter than a regular menstrual period. If there are any concerns about bleeding during pregnancy, it is important to consult a healthcare professional.