During pregnancy, it's important to take specific prenatal vitamins to support the health of both you and your baby. The most crucial vitamin is folic acid, which helps prevent neural tube defects in the developing fetus. The NHS recommends a daily intake of 400 micrograms of folic acid before conception and during the first 12 weeks of pregnancy. Additionally, iron is essential to help prevent anemia, and calcium supports bone health. Some women may also benefit from vitamin D, especially if they have limited sun exposure. Always consult your GP before starting any supplements to ensure they are appropriate for your individual needs.