3 sentences

1. 她最近内分泌失调。

   tā zuì​jìn nèi​fēn​mì shī​tiáo.

   She has been suffering from endocrine disorders lately.

   Source: Dong Chinese Dictionary

2. 长期熬夜会导致内分泌失调。

   cháng​qī áo​yè huì dǎo​zhì nèi​fēn​mì shī​tiáo.

   Staying up late for a long time can cause endocrine disorders.

   Source: Dong Chinese Dictionary

3. 甲状腺是人体重要的内分泌腺。

   jiǎ​zhuàng​xiàn shì rén​tǐ zhòng​yào de nèi​fēn​mì xiàn.

   The thyroid gland is an important endocrine gland in the human body.

   Source: Dong Chinese Dictionary