pregnenedione

例句：

1. 1.Pregnenedione is a hormone that plays a crucial role in regulating the menstrual cycle.
   孕酮是一种激素，在调节月经周期方面起着关键作用。
2. 2.The medication was prescribed to help with her menstrual irregularities.
   这种药物被开处方用于帮助她解决月经不规律的问题。
3. 3. Pregnenedione levels are often elevated during pregnancy due to increased estrogen production.
   由于雌激素产量增加，孕妇的孕酮水平通常会升高。