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在正常妊娠时由于雌激素的作用和肾素-血管紧张素-醛固酮系统功能亢进,至妊娠末期包括胎儿及其附属物在内至少有9L水分潴留。妊娠期水潴留使血清晶体渗透压下降10mOsm/kg,其变化发生在妊娠12周以前,此后至分娩期晶体渗透压无明显变化。 妊娠糖尿病患者中糖代谢正常者,其水电解质代谢及血浆量的变化与正常孕妇无显著差异。但血糖控制差者有发生巨大儿、羊水过多及体重异常增
During normal pregnancy due to estrogen and renin-angiotensin-aldosterone system hyperthyroidism, to the end of pregnancy, including the fetus and its appendages, including at least 9L of water retention. Water retention during pregnancy to make the serum crystal osmotic pressure decreased 10mOsm / kg, the change occurred in 12 weeks before pregnancy, then to birth during the crystal osmotic pressure did not change significantly. Gestational diabetes mellitus in patients with normal glucose metabolism, water and electrolyte metabolism and plasma volume changes and normal pregnant women no significant difference. However, poor blood glucose control occurred in children with huge, polyhydramnios and abnormal weight gain