妊娠经过中都属正常,但分娩时可突现危及母儿生命的重大变化。在母体方面为产科多量出血和子癎,在胎儿方面为胎儿窘迫和新生儿窒息。妊娠末期或分娩时,宫内羊水为胎粪污染混浊,被认为是与胎心搏数改变同起源于胎儿缺氧,是胎儿窘迫最易查知的体征。由于羊水混浊,在缺氧轻度情况下即可出现,故为早期发现胎儿窘迫的有利体征。 During pregnancy are normal, but the childbirth can be a significant change threatening the lives of mothers and children. In maternal terms, numerous obstructions occurred in obstetric subjects and children, fetal distress and neonatal asphyxia in the fetus. The end of pregnancy or childbirth, intrauterine amniotic fluid meconium-staining turbidity, is considered to be the same as fetal heart rate changes with the fetus due to hypoxia, fetal distress is the most easily detectable signs. Due to cloudy amniotic fluid, mild hypoxia can occur, so early detection of fetal distress favorable signs.