double pregnancy的用法和样例：
例句
- Study of the effect of misoprostol combined with oxytocin in preventing and treating postpartum hemorrhage caused by twin pregnancy.
米索前列醇配合缩宫素防治双胎妊娠产后出血的临床观察。 - In the meantime, patients must weigh the risks of multiple pregnancy against the prospect of remaining childless.
同时，家长必须权衡多胎妊娠的危险相对于仍旧没有子女的前景。
