When do pregnant women start taking prenatal vitamins?

It is generally recommended that pregnant women begin taking prenatal vitamins even before conceiving, ideally at least three months before pregnancy. This helps ensure that the body has a sufficient supply of essential nutrients that are vital for the early development of the fetus, such as folic acid, which is particularly important for preventing neural tube defects. By starting prenatal vitamins before pregnancy, women can increase their chances of having a healthy and successful pregnancy.