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目的:探讨妊娠期补充钙的适宜时间及对胎盘的影响。方法:将我院产检及分娩初产妇120例随机分四组实验组Ⅰ组、Ⅱ组、Ⅲ组分别于孕龄(4～12)周;孕龄(12～28)周;孕龄28周后开始补钙,每日服乐力1 000mg;对照组Ⅳ组:未服任何钙剂及补钙食物,普通饮食。结果:试验组与对照组均随着孕周增加血清钙水平、BMD(骨密度)逐渐降低,致孕晚期降低到最低水平,实验组三组间差异无显著性(P>0.05)。每组分别与对照组比较,随着孕龄增加对照组数值明显下降,差异具有显著性,(P<0.01)。结论:孕晚期28周开始补钙,可满足孕妇及胎儿的需钙量且有效预防胎盘钙化。
Objective: To investigate the appropriate timing of calcium supplement during pregnancy and its effect on the placenta. Methods: 120 cases of primipara in our hospital were randomly divided into four groups: experimental group Ⅰ, group Ⅱ and group Ⅲ respectively at gestational age (4 ~ 12) weeks, gestational age (12 ~ 28) weeks, gestational age 28 weeks After the start of calcium, daily music 1 000mg; control group Ⅳ: did not take any calcium and calcium foods, the general diet. Results: Compared with the control group, serum calcium level increased and BMD (BMD) decreased gradually to the lowest level in the third trimester of pregnancy. There was no significant difference between the three groups (P> 0.05). Each group compared with the control group, with the increase of gestational age control group decreased significantly, the difference was significant (P <0.01). Conclusion: The calcium supplement started 28 weeks after the third trimester, which can meet the calcium requirement of pregnant women and fetus and effectively prevent placental calcification.