单词ovulation-method
网络: 排卵期测量法；排卵法；探测排卵法
The cervical mucus method, also called the ovulation method and the Billings ovulation method, is a type of natural family planning.
宫颈粘液法，也被称为排卵法或者比林斯排卵法，是一种自然计划生育方式。