リズム法ほう

noun

rhythm method; calendar method

A method of birth control based on tracking the menstrual cycle to avoid intercourse on fertile days.

• リズム法ほうは、排はい卵らん日びを予よ測そくして避ひ妊にんする方ほう法ほうです。

  The rhythm method is a way of contraception by predicting the ovulation day.