Hormonal health
While genetics is the strongest determinant of when your perimenopause begins, several modifiable and non-modifiable factors influence the timeline.
Risk Factor | What the Evidence Shows | Modifiable? |
Family history | The age your mother or sisters entered perimenopause is the single strongest predictor of your own timeline. | No |
Smoking | Smokers typically reach menopause 1–2 years earlier. Nicotine has anti-estrogenic effects and accelerates follicle loss. | Yes |
Cancer treatment | Chemotherapy and pelvic radiation can damage ovarian tissue, triggering early or immediate surgical menopause. | Partial |
Ovarian surgery | Removal of both ovaries causes immediate surgical menopause. Even one ovary removed can accelerate the timeline. | Partial |
Autoimmune conditions | Thyroid disease, lupus, and rheumatoid arthritis are each associated with earlier menopausal transition. | Partial |
Low body weight | Very low body fat reduces peripheral estrogen production, potentially accelerating the transition. | Yes |
Earlier menarche | If you had your period earlier than many of your peers, you'll likely start perimenopause earlier too. | No |
