It is recommended for women planning a pregnancy to start taking a prenatal multivitamin at least 3 months before conception to prevent a deficiency in folic acid. This deficiency can have negative consequences on the health of the future baby. It is important to continue taking the prenatal multivitamin throughout the pregnancy and for several weeks after giving birth. Your partner does not need to take prenatal vitamins. It is best to consult with a pharmacist to find a personalized prenatal vitamin that meets your specific needs, including folic acid, iron, and vitamin B12. Additionally, you can maximize your intake of folic acid and other essential nutrients during pregnancy by consulting relevant sources like the provided website.