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在整个孕期中,无机盐和微量元素供给过多或过少,均会引起胎儿发育不良甚至造成出生缺陷.钙和磷 最早发现母体营养对胎儿发育有关的无机盐就是钙.胎儿骨骼和牙齿的钙化在母体内即已开始,婴儿出生时全部20个乳牙已经在齿槽内形成,第一对恒牙也已钙化.如果母体严重缺钙,胎体就不能正常发育和骨化.动物实验也证明,给母牛缺钙饲料,小牛就会死产或生后很快死亡.当给母牛补充含钙丰富的骨粉时,胎牛的发育
Throughout the pregnancy, the supply of inorganic salts and trace elements too much or too little, can cause fetal dysplasia or even cause birth defects.Calcium and phosphorus was first found in maternal nutrition is related to fetal development of inorganic salts is calcium.Fetal bone and teeth Calcification begins in the mother’s body, all 20 teeth of the baby born are already formed in the alveoli, and the first pair of permanent teeth has also been calcified .If the mother is seriously calcium-deficient, the carcass will not develop and ossify normally. Proved that, for cow calcium feed, the calf will die or die soon after birth.When the cow supplemented with calcium-rich bone meal, fetal development