不孕的

例句：

1. 1. The couple has beentrying for years to conceive a child,but to no avail.
   这对夫妇已经尝试了多年才怀孕，但都没有成功。
2. 2. Thewoman was diagnosed with infertilityand had to undergo in vitro fertilization treatment.
   这位女士被诊断为不孕症，并接受了体外受精治疗。
3. 3. Infertility is a common cause ofmiscarriage and stillbirth.
   不孕是流产和死产的常见原因。