Background: Few studies evaluate the effects of vitamin D status and supplementation on maternal bone mineral density (BMD) during lactation and further lack inclusion of diverse racial/ethnic groups, body mass index (BMI), or physical activity.Objective: Determine the effects of vitamin D treatment/status, feeding type, BMI, race/ethnicity, and physical activity on postpartum women's BMD to 7 months.Methods: Women with singleton pregnancies beginning 4-6 weeks' postpartum were randomized into two treatment groups (400 or 6400 IU vitamin D/day). Participant hip, spine, femoral neck, and whole-body BMD using Dual-energy X-ray absorptiometry (DXA Hologic), serum 25-hydroxyvitamin D [25(OH)D] (RIA; Diasorin), BMI, and physical activity were measured at 1, 4, and 7 months postpartum. A general linear mixed modeling approach was undertaken to assess the effects of vitamin D status [both serum 25(OH)D concentrations and treatment groups], feeding type, race/ethnicity, BMI, and physical activity on BMD in postpartum women.Results: During the 6-month study period, lactating women had 1-3% BMD loss in all regions compared with 1-3% gain in nonlactating women. Higher maternal BMI was associated with less bone loss in femoral neck and hip regions. Black American women had less BMD loss than White/Caucasian or Hispanic lactating women in spine and hip regions. Exclusively breastfeeding women in the 6400 IU vitamin D group had less femoral neck BMD loss than the 400 IU group at 4 months sustained to 7 months. Physical activity was associated with higher hip BMD.Conclusion: While there was BMD loss during lactation to 7 months, the loss rate was less than previously reported, with notable racial/ethnic variation. Breastfeeding was associated with loss in BMD compared with formula-feeding women who gained BMD. Higher BMI and physical activity independently appeared to protect hip BMD, whereas higher vitamin D supplementation appeared protective against femoral neck BMD loss.

Optimal growth can only be achieved through the interaction of genetic potential and optimal nutrition at the appropriate times (intrauterine, infancy, childhood and adolescence) to immediately effect timely active growth and “program” organogenesis and metabolism to optimize future growth and health. The “first 1000 days” is an essential period of early nutrition and growth intimately connected to breast milk. The WHO growth standards represent appropriate growth references for assessing the optimal growth of breastfeeding infants and children from 0–24 months and the CDC standards for 24–59 months. Growth faltering in a breastfeeding infant when recognized by comparison of an individual child's growth to the WHO growth standards for breastfeeding infants should be a call for assessment of the situation and intervention to optimize nutrition allowing the infant to return to appropriate growth. Direct observation of the breastfeeding mother and child is essential to identifying breastfeeding difficulties and potential solutions. Childhood obesity is a complex condition generated through the interaction of genetics and environment. There are numerous potentially contributing factors acting in the prenatal, intrauterine and postnatal periods. Body mass index (BMI) is the accepted practical estimate of adiposity, overweight and obesity.

Recommendations for maternal supplementation during lactation are unnecessary unless the mother’s diet is deficient. Continuing prenatal vitamins postpartum is usually adequate. For malnourished women, supplementation may be appropriate after a personalized assessment of maternal deficiencies and intake. For lactating mothers adhering to the more restrictive vegetarian diets, the use of complementary protein combinations; supplementation with D and B vitamins; and attention to protein, iron, and calcium intake are appropriate. Maintaining adequate vitamin D stores during pregnancy and lactation is important. Supplements for breastfeeding infants are likely unnecessary in exclusively breastfed infants unless a deficiency is identified. The AAP does recommend vitamin D 400 mg beginning at birth. Iron needs should be addressed with appropriate solid foods (iron rich or iron fortified) after 6 months of exclusive breastfeeding.

The mammary gland is not fully developed at birth. It undergoes significant changes throughout life due to mammogenesis, lactogenesis, involution, and the cyclical hormonal changes of menstruation. The skin, subcutaneous tissue/supportive structures (blood vessels, lymphatics, nerves, connective tissue), and corpus mammae make up the anatomy of the breast.

The long history of breastfeeding in infant nutrition and health, the progressive changes in breastfeeding and the use of donor human milk, and our increasing scientific understanding of lactation and the essential composition and health benefits of human milk have led us to uniquely value human milk for infant nutrition. The improvement in breastfeeding rates in the past several decades, the general recognition of human milk as the first food for infants, and a greater realization of the role of breastfeeding in human development bring us into a new era for breastfeeding. We recognize the barriers and difficulties for successful breastfeeding; we are examining our practices for any persisting or new barriers to breastfeeding and are devising solutions to them. Human milk is the norm for human infants and for optimal nutrition and growth. Some of the questions we face in this new era of lactation and human milk include how to effectively support every woman to reach her personal breastfeeding goals. How can we reduce the inequalities and inequities of available breastfeeding services and support, which ultimately should improve breastfeeding rates overall? What more can we learn of the science of lactation and human milk that will inform how we can promote breastfeeding to augment the positive health outcomes for mothers and infants? How do we create legislation and policy that protect and facilitate breastfeeding in public, in our communities, and in the workplace? How do we optimize the practice of patient-centered and culturally sensitive communication to support women and families in their infant-feeding decisions and breastfeeding? If we can answer these questions using a framework of social justice, and the answers are based on evidence-based practice, science, and research, we will create a new era of successful, life-affirming breastfeeding and the use of human milk as the first food for all infants.

A large proportion of women are exposed to medications over the period of lactation. Although there are questions and concerns raised by these exposures, there is adequate safety information for both the mother and the infant about the use of many medications while breastfeeding. There are excellent resources for medications and lactation in print and online. A careful review of the most current information from one or more of these sources should inform a risk–benefit assessment for the use of a medication during lactation. There are also safer alternative medications and treatments available in many situations, such that an appropriate medical regimen can be devised, and breastfeeding can safely continue in most situations. Mothers need to receive clear information from their health professional and be supported to make an informed choice for their own medical treatment and continuing breastfeeding to glean the ample benefits of breastfeeding for both the mother and infant. Herbal products should be used with caution during lactation because the purity of the preparations is not routinely regulated, nor are all chemicals within an herbal product named on the labels. The possibility of environmental chemicals or toxins contaminating human milk exists. The levels of such chemicals in human milk are low compared with other sources within the environment. If there is an identified exposure or toxicity in the mother, then her breast milk should be assessed, caution advised, and clinical observation of the infant initiated.

Abstract Human milk is a highly complex composite liquid of nutrients for infant growth, consisting primarily of fat, carbohydrates, and proteins, as well as minerals, vitamins, and other nutrients. The delicate balance of nutrients and the dynamic lactation process make human milk the only food substance during life that is adequate as the sole source of nutrition for a period of time in an infant's life. The biochemistry of human milk changes throughout the stages of breastfeeding and as a function of infant needs and demands for growth and development. There remains a tremendous amount to be learned about the interaction of macronutrients, micronutrients and bioactive factors in human milk as the optimal nutrition for a human infant.

A central goal of the Academy of Breastfeeding Medicine is the development of clinical protocols for managing common medical problems that may impact breastfeeding success. These protocols serve only as guidelines for the care of breastfeeding mothers and infants and do not delineate an exclusive course of treatment or serve as standards of medical care. Variations in treatment may be appropriate according to the needs of an individual patient.

A central goal of the Academy of Breastfeeding Medicine is the development of clinical protocols for managing common medical problems that may impact breastfeeding success. These protocols serve only as guidelines for the care of breastfeeding mothers and infants and do not delineate an exclusive course of treatment or serve as standards of medical care. Variations in treatment may be appropriate according to the needs of an individual patient.

A central goal of the Academy of Breastfeeding Medicine is the development of clinical protocols for managing common medical problems that may impact breastfeeding success. These protocols serve only as guidelines for the care of breastfeeding mothers and infants and do not delineate an exclusive course of treatment or serve as standards of medical care. Variations in treatment may be appropriate according to the needs of an individual patient.

A central goal of The Academy of Breastfeeding Medicine is the development of clinical protocols, free from commercial interest or influence, for managing common medical problems that may impact breastfeeding success. These protocols serve only as guidelines for the care of breastfeeding mothers and infants and do not delineate an exclusive course of treatment or serve as standards of medical care. Variations in treatment may be appropriate according to the needs of an individual patient.

The Academy of Breastfeeding Medicine is a worldwide organization of physicians dedicated to the promotion, protection and support of breastfeeding and human lactation. Our mission is to unite into one association members of the various medical specialties with this common purpose.

Lactation is the physiologic process of milk production and the completion of the pregnancy cycle. The goal for all pregnancies should be to support and encourage women to breastfeed, as the benefits to both mother and infant are well established. However, when managing pregnancy and lactation with a woman who also has a neurological disorder, it is essential to understand the impact on lactation of both the disease and the medications for treating the disease. Ideally disease control can be optimized and medications altered to reduce any negative influence on the mother or infant during lactation. Although neurologic disease does not typically interfere with breastfeeding, limited mobility, fatigue, decreased sensation, medications, and surgeries may add additional challenges for the breastfeeding woman with a neurologic condition. The goal of the neurologist, obstetrician, pediatrician, and lactation consultant should be to support and encourage breastfeeding, while minimizing the risk of medications for the infant.