英语语法分析

Absence of mastodynia (breast pain or tenderness) occurs in about 20% of women with ovulatory problems.

无乳突痛（乳房疼痛或压痛）出现在约20%有排卵问题的妇女中。

Ovulatory periods are often accompanied by midcycle symptoms.

排卵期常伴有月经中期症状。

Objective to observe the clinical effect of "Cupai Decoction" in the treatment of ovulatory dysfunction.

目的观察促排卵汤对排卵功能障碍的临床疗效。