Boylan P, Lewis P J
Obstet Gynecol. 1980 Jul;56(1):35-8.
Fetal breathing during labor was investigated in a 3-part study of 42 normal singleton pregnancies. In the first part fetal breathing movements (FBM) were compared antenatally and during labor in 22 patients to determine whether FBM persisted during labor in fetuses in whom these movements had been demonstrated antenatally. In the second part a double-blind trial was conducted on the responsiveness of fetal breathing in labor to maternal glucose infusion in 12 patients. In the third part the influence of artificial rupture of the membranes (ARM) to induce labor was examined in 8 patients. Fetuses spent 36% of their time making breathing movements antenatally but this decreased to less than 1% during labor. Fetal trunk movements also decreased during labor but not significantly. Fetal breathing and trunk movements were not stimulated by maternal glucose infusion. Fetal breathing but not trunk movements were significantly inhibited by ARM prior to the onset of labor. Cessation of fetal breathing in labor is normal, but the cause of this change in behavior has not been positively identified.
在一项针对42例正常单胎妊娠的三部分研究中，对分娩期间的胎儿呼吸进行了调查。在第一部分中，对22例患者的胎儿呼吸运动（FBM）在产前和分娩期间进行了比较，以确定在产前已证实有这些运动的胎儿中，FBM在分娩期间是否持续存在。在第二部分中，对12例患者进行了双盲试验，研究分娩时胎儿呼吸对母体输注葡萄糖的反应性。在第三部分中，对8例患者检查了人工破膜（ARM）引产的影响。胎儿在产前有36%的时间进行呼吸运动，但在分娩期间这一比例降至不到1%。胎儿躯干运动在分娩期间也有所减少，但不显著。母体输注葡萄糖并未刺激胎儿呼吸和躯干运动。在分娩开始前，ARM可显著抑制胎儿呼吸，但不抑制躯干运动。分娩时胎儿呼吸停止是正常现象，但这种行为变化的原因尚未得到确切证实。
