No differences have been found neither in duration, weight of newborn, postnatal growth nor abortion rate among pregnant women who decided to continue breastfeeding their children with a new pregnancy. Less increase in body weight and lower level of hemoglobin, along with other problems, has been shown among women from economically deprived populations. Many of them are old articles that couldn't be replicated. In most instances in industrialized communities, despite it is assume that breastfeeding poses a higher caloric burden is considered to be safe for the pregnancy and the fetus. Some Organizations of Perinatology have openly backed that position. In cases of history of frequent abortion or premature labor risk, theoretically, it would be recommended to observe if Oxytocin peaks due to suckling are cause of uterine contractions that should indicate to stop breastfeeding temporally. Historically, breastfeeding has been regard as an contraceptive method. However, whenever not exclusive and beyond the first six-month period (LAM), breastfeeding should not be considered a reliable method for this purpose, nor should be a cause to avoid a new pregnancy. Possibly because of change in milk taste, higher nipple sensitivity, rejection feelings by the mother to continue breastfeeding, decreased production and spontaneous weaning are factors to stop breastfeeding while pregnancy. Whenever breastfeeding was chosen to be continued, the breast re-starts production of colostrum as delivery time approaches and in the early postpartum.