birth difficulty

• 难产

birth difficulty的用法和样例：

例句

1. This time, unlike the first, the birth was an ordeal.
   与头胎不同，这次是难产。
2. The drug, sold generically as isotretinoin, can cause birth defects if taken during pregnancy.
   这些药物一般属于异维甲酸类，怀孕期间使用能够导致难产。