Meibodi Mandana Rashidi, Mossayebi Elaheh, Najmi Zahra, Moradi Yousef
IVF Center, Shahid Akbarabadi Hospital, Iran University of Medical Sciences, Tehran, Iran.
Department of Perinatology, Shahid Akbarabadi Hospital, Iran University of Medical Sciences, Tehran, Iran.
Med J Islam Repub Iran. 2017 Dec 17;31:93. doi: 10.14196/mjiri.31.93. eCollection 2017.
Fetal male gender may affect the progression of labor and could be a risk factor for labor arrest. This study was conducted to evaluate the effect of fetus gender on labor curve. In this cohort study, 1550 singleton term pregnant women in labor phase (either spontaneous or by induction) were enrolled. Results of regular cervical examination, dilation, length of labor stages, mode of delivery, and sex of the fetus, and birth weight were recorded for all participants. Labor progression curve was compared between two sex groups with independent t test and chi2 test. : Finally, 1527 women completed the study (47.8% female and 52.1% male). Mean duration from beginning of the active phase up to full dilatation, from 4 to 6 cm, 6 to 8 cm, and 8 to 10 cm dilatations, were significantly longer in the male sex group compared to the female (p˂0.05). All durations were also significantly different when parity was considered (p˂0.05). We could not show fetal sex as an independent risk factor for active phase arrest (OR Adjusted: 1.18, CI 95% 1.01:1.42). Active phase stage was slower and longer in women who carried male fetuses compared to those carrying female fetuses; however, fetal sex did not increase the risk of active phase arrest.
胎儿性别可能会影响产程进展，并且可能是产程停滞的一个风险因素。本研究旨在评估胎儿性别对产程曲线的影响。在这项队列研究中，纳入了1550名单胎足月处于产程阶段（自然分娩或引产）的孕妇。记录了所有参与者的常规宫颈检查结果、宫口扩张情况、产程各阶段时长、分娩方式、胎儿性别以及出生体重。采用独立t检验和卡方检验比较了两个性别组之间的产程进展曲线。最后，1527名女性完成了研究（女性占47.8%，男性占52.1%）。与女性组相比，男性组从活跃期开始到宫口完全扩张、从4厘米到6厘米、6厘米到8厘米以及8厘米到10厘米扩张阶段的平均时长显著更长（p˂0.05）。在考虑产次时，所有时长也存在显著差异（p˂0.05）。我们未能证明胎儿性别是活跃期停滞的独立风险因素（校正后比值比：1.18，95%置信区间1.01:1.42）。与怀有女胎的女性相比，怀有男胎的女性活跃期进展更慢且更长；然而，胎儿性别并未增加活跃期停滞的风险。
