Bipolar disorder study links regular menstrual cycles to more severe premenstrual symptoms
A survey of 267 women of reproductive age with bipolar disorder found that those with regular cycles were more likely to report severe premenstrual symptoms than those with irregular cycles. Women with regular menstruation were also less likely to use hormonal contraceptives, and more of them had stopped due to side effects. The lead researcher said the findings raise questions about whether some women with bipolar disorder are especially sensitive to hormonal contraceptives while others might benefit.
The survey covered 267 women of reproductive age with bipolar disorder; 62% had regular cycles and 38% irregular. Those with regular cycles more often reported premenstrual irritability, anger, relationship strain, physical complaints and distress affecting work or daily activities in nearly every premenstrual phase over the past year.
Nearly all participants (93%) had used hormonal contraception at some point, yet those with regular cycles were less likely to be current users and more often quit because of side effects. The work was presented at the 2026 ECNP Congress in Munich, is preliminary, based on an online survey, and not yet peer reviewed.
Roughly 1–2% of women have bipolar disorder, so these findings could touch a substantial group — around 235,000 women of childbearing age in a country such as the UK, France or Italy. If replicated, they may prompt clinicians to ask about menstrual patterns and premenstrual mood changes, and to weigh contraception choices more carefully. Women who feel their cyclical symptoms are dismissed could gain validation, though the preliminary survey design means treatment guidance should not shift yet.