To encourage breastfeeding, practitioners should begin discussions prenatally, mentioning the multiple advantages: For the child: Nutritional and cognitive advantages and protection against infection, allergies, obesity, Crohn disease, and diabetes For the mother: Reduced fertility during lactation, more rapid return to normal prepartum condition (eg, uterine involution, weight loss), and protection against osteoporosis, obesity, and ovarian and premenopausal breast cancers Milk production is fully established in primiparas by 72 to 96 hours and earlier in multiparas.