placenta previa

常见例句

Placenta previa occurs 6 to 15 times more often after a woman has had an abortion.
在女性人流后前置胎盘发生率会6-15倍于常人。
Placenta previa — when the placenta partially or completely covers the cervix, which can cause severe bleeding before or during delivery
前置胎盘- 胎盘部分或者全部覆盖子宫颈，造成产前或产中大出血
But in instances where women are at increased risk of preterm labor or have complications such as placenta previa — where the placenta overlays the cervix — abstinence may be indicated.
但是如果孕妇有未足月生产的风险或是有例如胎盘前置（胎盘附着于子宫下段或覆盖在子宫颈内口处）的并发症，那么就有必要节欲了。