Szoptatás és csontritkulás

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

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.

Are early growth and nutrition related to bone health in adolescence? The Copenhagen Cohort Study of infant nutrition and growth.

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.

Maternal calcium metabolism and bone mineral status

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.

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