oestrin

例句：

1. 1.Oestrin plays a crucial role in the development of female reproductive organs.
   雌激素在女性生殖器官的发展中起着关键作用。
2. 2. The body produces oestrin naturally, which helps regulate menstruation and fertility.
   身体自然产生雌激素，有助于调节月经和生育能力。
3. 3.Oestrin therapy is often used to treat conditions such as breast cancer and osteoporosis.
   雌激素疗法常用于治疗乳腺癌和骨质疏松症等疾病。