title: [Calcium and vitamin D metabolism during pregnancy and lactation].
abstract: During pregnancy, considerable amounts of calcium are transported from mother to fetus through the placenta. Calcium needs for milk production during lactation. The maternal bone density during reproducton if there is enough calcium supplimentation. The bone density is regained after several years. In order to satisfy the inceased demands for calcium, maternal metabolism of bone change dynamically during pregnancy and lactation. Calcium absorption rate is increased by 1,25 (OH)(2)D , which is activated with IGF- I , estrogen. Toxemia and eclampsia is a major complication of pregnancy. Calsium supplimentation prevent of these complication.
authors.affiliation: Department of Obstetrics and Gynecology, Nissay Hospital, Nippon Life Saisekai Foundation.
authors.forename: Kenji
authors.initials: K
authors.lastname: Hirota