“A Review on Hormonal Disruption? The Impact of Norethisterone on Menopausal Timing”

Norethisterone, a synthetic progestin, is widely used to manage menstrual disorders and as part of hormone replacement therapy (HRT). Its mechanism involves suppressing the hypothalamic–pituitary–gonadal axis, which can delay ovulation and temporarily alter menstrual patterns. While some women experience delayed periods or irregular cycles after discontinuing norethisterone, there is no strong clinical evidence to suggest that it directly delays the onset of menopause. Short-term hormonal disruption may mimic menopausal symptoms, such as mood swings, hot flashes, or cycle changes, but these effects are usually reversible. When used in HRT, norethisterone offers benefits like endometrial protection and improved bone health, though it may carry a slightly higher breast cancer risk compared to other progestins. Overall, while norethisterone can influence hormonal balance temporarily, it does not appear to significantly impact the natural timing of menopause.