Pregnacare Breast-feeding can also be taken as a general postnatal supplement for 6-9 months following childbirth or longer if required, to replace depleted nutrients and assist the body following pregnancy, even if you are not breast-feeding. Pregnacare Breast-feeding contains 10mcg vitamin D as advised by the UK Department of Health during pregnancy and breast-feeding, the full RNI of 700mg calcium and 300mg DHA, the exact level recommended by international experts*.