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胎儿在子宫内发育的迟缓状态称为宫内胎儿发育迟缓(intrauterine fetal growth retardation,IUGR)。其围产期死亡率、新生儿期死亡率为正常胎儿的6～8倍,远期预后脑性瘫痪的发生率亦高,精神发育和躯体发育也差。超声波检查可早期确诊,对胎儿进行监护很有必要。近年,经脐带采血做胎儿血气分析,证实了 IUGR 儿的 PaO_2处于正常下限,但在低氧血症下,其心率、胎动、胎儿呼吸动作未必有异常所见,其原因可能是胎儿和成人一样,对缺氧有适应力,究其原因尚不十分清楚。作者用羊胎仔试验结果表明,胎仔最初处于低氧血症时,出现心率过缓,胎仔的呼吸动作被抑制,但
The slow development of the fetus in the uterus is called intrauterine fetal growth retardation (IUGR). The perinatal mortality, neonatal mortality rate of 6 to 8 times the normal fetus, long-term prognosis of cerebral palsy is also a high incidence, mental development and physical development is also poor. Ultrasound can be diagnosed early, fetus monitoring is necessary. In recent years, the umbilical cord blood to do fetal blood gas analysis confirmed that IUGR children PaO_2 in the normal lower limit, but in hypoxemia, the heart rate, fetal movement, fetal respiratory motion may not have abnormal findings, the reason may be the same as the fetus and adults , Adaptability to hypoxia, the reason is not yet fully understood. The results of the experiment with sheep fetus showed that when the fetus was initially hypoxemia, the heart rate was slow and the respiration behavior of the fetus was inhibited. However,