没有宫缩的外伤孕妇一般无胎盘早剥，然而10分钟内宫缩超过一次（每小时6次）的患者胎盘早剥的发病率为20%。
Trauma patients with no uterine contraction activity, usually do not have abruption, while patients with greater than one contraction per 10 minutes (6 per hour) have a 20% incidence of abruption.
在妊娠期较晚时的测试性能的提高可能与随着胎儿和胎盘的发育母体血液中无细胞胎儿dna浓度的增加有关。
The improved performance with later gestation is likely attributable to the increased concentration of cell-free fetal DNA within maternal blood as the fetus and placenta develop.
在妊娠期较晚时的测试性能的提高可能与随着胎儿和胎盘的发育母体血液中无细胞胎儿dna浓度的增加有关。
The improved performance with later gestation is likely attributable to the increased concentration of cell-free fetal DNA within maternal blood as the fetus and placenta develop.
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