Exposure to CC or CC+CLA was obtained from two sources. A search was made in the clinical histories of all the records corresponding to medical and nutritional prescriptions, looking for dates in which such drugs were prescribed and the corresponding week of the pregnancy. Secondly, in the drug-surveillance database, through the affiliates code, an equal search was conducted, comparing the results. For CC+CLA, the study kept records, at the start of the exposure, the date on which the pharmacy delivered the medication to the pregnant woman.