“Menstrual cycle” is not the same as “menstrual period.” It is important to understand that a menstrual cycle averages 28 days, a roughly 1 month time period rather than the 1 week duration of menses. While to some this may seem like a “minor” error of one word, it in essence is a “major” contextual error, the significance of which is profound when translating or interpreting instructions for emergency contraception.
.
