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怀孕是生理过程,妊娠期机体的变化保持了机体内部的平衡。怀孕后心脏负担加重,血容量增加约40%～50%,即增加血浆2000毫升左右;心率加快,每分钟增加10～15次左右。孕期肾脏功能也有明显改变。肾血流量及肾小球滤过率增加。肺脏及肝脏功能也有较大影响。有些孕妇在怀孕早期肝功就有轻度异常。因此,怀孕
Pregnancy is a physiological process, pregnancy changes in the body to maintain the balance within the body. After pregnancy, the burden on the heart increased, blood volume increased by about 40% to 50%, that is, about 2000 ml of plasma; heart rate increased by 10 to 15 times per minute or so. Kidney function during pregnancy also changed significantly. Renal blood flow and glomerular filtration rate increased. Lung and liver function also have a greater impact. Some pregnant women in the early pregnancy have mild abnormal liver function. So pregnant