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阵痛和分娩

ID: ANH11041chis
医疗动画文字记录:在阴道分娩过程中,第一阶段的阵痛持续12~19个小时,从胎儿下降到骨盆下部开始。作为反应,子宫颈开始消失,或变薄,扩张,或变宽。在这段时间里,你可能会感到强烈的、每5~20分钟发生一次的有规律的宫缩,腰痛和抽筋不会消失。你可能会看到褐色或红色的黏液流出,这可能是宫颈口的黏液塞掉出来了。羊水可能会破裂,可能是大量的液体喷出,也可能是连续的细流。如果你有这些症状,请联系医生或助产士,判断你是否应该去医院。在第二产程开始(这一阶段可能持续几分钟到3个小时),宫颈完全扩张到10厘米,胎头已经从宫颈口移动到产道。在这个阶段,你会开始娩出胎儿。当你感到有压力时,你可能会本能地去娩出胎儿,或者你可能需要医生、助产士或产程护士指导你什么时候用力,什么时候休息。在正常分娩中,胎头会转到你的背部。在主动分娩过程中,子宫被分为收缩的主动节段和保持放松的灵活被动节段,拉伸为胎儿通过提供更多的空间。在某些情况下,当胎头顶出现时,医生可能会做一个小切口,称为外阴切开术,以扩大阴道口。你需要继续把孩子生出来。当胎儿头部通过产道时,会形成一个细长的形状。随着头骨的恢复,头部的拉长会在几天内自行消失。当胎头从产道出来后,头和肩膀会旋转来帮助肩膀通过产道。肩膀一侧一侧地娩出,以适应你的骨盆。一旦肩膀露出来,胎儿的其他部分就会很容易地滑出来。宝宝出生后,剪断脐带。在第三产程,可能持续5~30分钟,轻微的宫缩将有助于将胎盘娩出子宫。在这个阶段,你和宝宝可能会通过肌肤接触和母乳喂养开始亲密接触。
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