安あん全ぜん日び

noun

safe day (in the menstrual cycle)

Refers to a day in the menstrual cycle when the risk of pregnancy from unprotected intercourse is considered low. Often used in the context of the rhythm method or fertility awareness.

• 安あん全ぜん日びだからといって、避ひ妊にんを怠おこたってはいけない。

  Just because it's a safe day, you shouldn't neglect contraception.