When pregnant with twins, you will need to eat more than if you were carrying one baby. Eating well and gaining weight are important for your health and the health of your twins. Your body must nourish the babies and meet your energy needs as well. You will need to eat about 2,700 calories every day, if you are of average weight.
You should gain more weight when carrying twins than if you were having only one baby. Plan to gain 16-20 kilograms. In the last half of pregnancy, you should gain about 0.75 kilograms per week. If you are underweight, you may need to gain more. If you are overweight, you may need to gain less.
In addition to a prenatal vitamin, your doctor may prescribe extra vitamins and minerals to help your babies grow. Anemia (iron-poor blood) is more common in women who are pregnant with twins, so it's especially important to take your prenatal vitamins and iron as prescribed. Folic acid is also important for twins. It is hard to get all the folic acid you need just from your diet, so you should take a prenatal vitamin that contains folic acid. It is important to stop drinking alcohol, smoking, and taking illegal drugs during pregnancy.