Breastfeeding by itself is not a contraindication for blood donation. Restrictions to donate blood by nursing mothers are intended to preserve iron levels and avoid additional nutritional stress. Indeed, it is more related to pregnancy and childbirth than to breastfeeding itself. Various responsible agencies keep a wide range of time-exclusion criteria to become a donor after childbirth, ranging from 6 weeks required by the American Association of Blood Banks and the American Red Cross, to 12 weeks in Paraguay where a previous medical approval is required, 6 months in El Salvador and Hema-Quebec to 9 months by the Australian Red Cross and the United Kingdom Blood Transfusion Services (the latter criterion is to extend exclusion for more than one week the duration of last pregnancy). The Pan American Health Organization and the Spanish Ministry of Health completely exclude nursing mothers of blood donation. Spanish Red Cross excludes those women within 6 months after delivery. Despite this wide variability of criteria, a consensus would be highly desired in order to avoid unnecessary exclusion of donating women mostly because the fact that women are the more frequent blood donors.