As long as you have been taking the pill correctly and consistently each day, you are protected from pregnancy even during the placebo week. The pill and other hormonal birth control methods work by preventing your ovaries from releasing an egg (ovulation). So, if there is no egg, pregnancy cannot occur, including during the off week.
Can you get pregnant on your period on the pill?
By Sara Salgado B.Sc., M.Sc. (embryologist).
Last Update: 10/06/2017
Degree in Biochemistry and Molecular Biology from the University of the Basque Country (UPV/EHU). Master's Degree in Human Assisted Reproduction from the Complutense University of Madrid (UCM). Certificate of University Expert in Genetic Diagnosis Techniques from the University of Valencia (UV).