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Pregnancy: Noriday is not indicated during pregnancy. If pregnancy occurs during medication with Noriday, treatment should be withdrawn immediately. Like all norethisterone derivatives used for contraception, Noriday has slight androgenic activity. At doses higher than normally used in OC and HRT formulations, masculinisation of female foetuses has been observed. The results of most epidemiological studies to date relevant to inadvertent foetal exposure to combinations of oestrogens with progestogens, indicate no teratogenic or foetotoxic effects.
Breast-feeding: There is no evidence that Norethisterone tablets diminish the yield of breast milk. Small amounts of steroid materials appear in the milk; their effect on the breast-fed child has not been determined.
