Tag Archive for: Szoptatás és csontritkulás

Lactation is associated with greater maternal bone size and bone strength later in life

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Wiklund PK, Xu L, Wang Q, Mikkola T, Lyytikäinen A, Völgyi E, Munukka E, Cheng SM, Alen M, Keinänen-Kiukaanniemi S, Cheng S.
Osteoporos Int. 2012 Jul;23(7):1939-45.

Abstract

Summary The association between lactation and bone size and strength was studied in 145 women 16 to 20 years after their last parturition. Longer cumulative duration of lactation was associated with larger bone size and strength later in life.

Introduction Pregnancy and lactation have no permanent negative effect on maternal bone mineral density but may positively affect bone structure in the long term. We hypothesized that long lactation promotes periosteal bone apposition and hence increasing maternal bone strength.
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Are early growth and nutrition related to bone health in adolescence? The Copenhagen Cohort Study of infant nutrition and growth.

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Abstract

BACKGROUND: It is generally accepted that peak bone mass affects later fracture risk in the elderly. The extent to which early nutrition and growth can program later bone health has been examined in only a few studies. In the Copenhagen Cohort Study we showed that breastfed infants had significantly higher serum (s)-osteocalcin concentration than did formula-fed infants.

OBJECTIVE: We investigated whether early nutrition and early growth are associated with later bone mass in adolescence.

DESIGN: Participants were examined at birth; at ages 2, 6, and 9 mo (n = 143); and at age 17 y (n = 109) with anthropometric and s-osteocalcin measures and whole-body dual-energy X-ray absorptiometry (DXA) scanning (age 17 y only).
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Effect of Exercise Training on Loss of Bone Mineral Density during Lactation

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Lovelady CA, Bopp MJ, Colleran HL, Mackie HK, Wideman L.

Med Sci Sports Exerc. October 2009 – Volume 41 – Issue 10 – pp 1902-1907

Abstract

PURPOSE: During lactation, women transfer approximately 200 mg of calcium per day to breast milk. For 6 months, this is equivalent to 3%-9% of bone mineral density (BMD) loss at trabecular-rich sites. Bone mass usually returns to prepregnancy levels with cessation of lactation but not in all women. Therefore, the purpose of this study was to determine whether exercise slows bone loss from 4 to 20 wk postpartum (PP).

METHODS: At 4 wk PP, women were randomized to either an exercise group [EG, n = 10, weight bearing aerobic exercise (3 d.wk,
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Outcomes of Breastfeeding versus Formula Feeding

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A csecsemőtáplálás módjának a csecsemő és az anya egészségére gyakorlt hatásával kapcsolatos kutatási eredmények jól áttekinthető összefoglalása.

Letölthető a La leche League International oldaláról.
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The Effect of Calcium Supplementation on Bone Density During Lactation and After Weaning

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Background
Women may lose bone during lactation because of calcium lost in breast milk. We studied whether calcium supplementation prevents bone loss during lactation or augments bone gain after weaning.
N Engl J Med 1997;337:523-8.

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Maternal calcium metabolism and bone mineral status

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ABSTRACT Human pregnancy is associated with major changes in calcium and bone metabolism and in bone mineral status before and after gestation. The changes are compatible with the uptake and mobilization of calcium by the maternal skeleton to meet the high requirement for fetal growth and for breast-milk production. Breast-feeding is accompanied by decreases in bone mineral status, increases in bone turnover rate, and reductions in urinary calcium excretion. These effects are reversed during and after weaning, and, in several skeletal regions, bone mineral content ultimately exceeds that measured after delivery. By 3–6 mo after lactation, the postpartum changes in bone mineral status of women who breast-feed largely match those of women who do not, regardless of the duration of lactation.
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