Raven is under oral contraceptive therapy.In this case,what does breakthrough spotting most likely indicate?

Question

Quizplus · Accepted Answer

For most oral contraceptives, one pill is taken daily, preferably at the same time each day, approximately every 24 hours. The usual sequence is that one tablet is taken (beginning on day 5 of the menstrual cycle) for 20 to 21 consecutive days. A few days after the last tablet is taken, bleeding (menses) occurs. If one dose is missed, breakthrough spotting may occur.

Raven Is Under Oral Contraceptive Therapy