It is not possible to get pregnant on the contraceptive break if it has been taken correctly. The contraceptive must always be taken at the same time and without failures. It acts by inhibiting ovulation, which is the right time to get pregnant. During the contraceptive pause week, peeling of the endometrium (inner layer of the uterine cells) and bleeding, which is menstruation, will occur. This phase is incompatible with the process of fertilization and pregnancy.
However, if during contraceptive use, prior to pause, gastrointestinal disturbances occur with diarrhea or vomiting up to 4 hours after ingestion, the absorption of contraceptive may be impaired, reducing its efficacy. Also the use of medications, such as certain antibiotics and anticonvulsants, can interfere with their action.
In cases of doubts about the efficacy of the contraceptive, an alternative contraceptive method, such as the condom, should be used until the final use of the card and the beginning of the new one.
The gynecologist is the professional advised to advise on the use of the contraceptive.
