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Pregnancy: Letrozole is contraindicated during pregnancy.
Women of perimenopausal status or child-bearing potential: The physician needs to discuss the necessity of adequate contraception with women who have the potential to become pregnant including women who are perimenopausal or who recently became postmenopausal, until their postmenopausal status is fully established.
Lactation: Letrozole is contraindicated during lactation.
