In the months following childbirth, most new moms need anywhere from 1,800 to 2,200 calories each day. If mom is nursing, she will need about 500 additional calories. If mom is underweight, works out more than 45 minutes a day, or is breastfeeding more than one infant, that number increases. Talk to your doctor to figure out the right amount for you and to determine the continuation of vitamin supplementation.
For more information on nutrition following childbirth, please visit, http://www.babyyourbaby.org/pregnancy/after-pregnancy/breastfeeding-and-your-nutrition.php