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目前对更年期和绝经期的骨矿物质含量研究较多,普遍认为此时期卵巢功能衰退而造成雌激素低下,导致骨矿物的丢失,因而造成骨质疏松。那么,在妊娠和哺乳这个阶段,内分泌及生化指标发生了很大的波动。同时,由于妊娠期母体供给胎儿钙大约30g,以保证胎儿骨骼和胎盘形成,哺乳时,乳汁每天排钙约300～500mg。体内为了保证胎儿和乳汁的需要,维持血钙的平衡,一方面动员骨钙脱钙,而使骨密度减少;另一方面增加饮食中钙
At present, there are more studies on the bone mineral content in menopause and menopause. It is generally believed that the decline of ovarian function during this period causes the estrogen to be low, which leads to the loss of bone mineral, thus resulting in osteoporosis. Well, at this stage of pregnancy and lactation, endocrine and biochemical indicators of a great deal of fluctuations. At the same time, as the mother during pregnancy supply of fetal calcium about 30g, in order to ensure the formation of fetal bones and placenta, breast-feeding, milk discharge about 300 ~ 500mg per day. In order to ensure the fetus and milk in the body to maintain the balance of blood calcium, on the one hand to mobilize bone calcium decalcification, leaving the bone mineral density decreased; on the other hand increase the diet of calcium