irregular ripening of endometrium

例句：

1. 1.The irregular ripening of the endometrium is a significant factor in fertility issues.
   子宫内膜不规则成熟是生育问题的一个关键因素。
2. 2.The study found that irregular ripening of the endometrium could be linked to increased risk of miscarriage.
   研究发现，子宫内膜不规则成熟与流产风险增加有关。
3. 3.The doctor explained that irregular ripening of the endometrium can lead to uterine fibroids, which can cause pain and discomfort during menstruation.
   医生解释说，子宫内膜不规则成熟可能导致子宫纤维瘤，这在月经期间会引起疼痛和不适。