A prospective study of menopause in women with Down's syndrome.

Doctors tracked 78 women with Down syndrome for up to seven years. They asked each woman, or her caregiver, the date of her last period. They also checked thyroid levels every year.

The average age of menopause was 46. That is about six years earlier than women in the general population. Thyroid problems did not change the timing. Women who smoked reached menopause one year sooner than non-smokers.

Yuwiler et al. (1992) saw no memory loss in the same age group over five years. The new data say the body, not the brain, ages faster. Together they show you must watch for two clocks: one for hormones, one for cognition.

Rose et al. (2000) found frontal-lobe dementia can start in the 30s. Because menopause also arrives early, mood or behavior changes could come from either hormone shifts or early dementia. Screen for both causes, not just one.

Laposa et al. (2017) showed hearing loss hits two-thirds of adults by age 50. Add early menopause to the list of routine checks. A yearly audit for an adult with Down syndrome now needs three lines: ears, bones, and hormones.

Move the first DEXA scan and heart-health labs to age 40, not 50. Teach caregivers that hot flashes or sleep changes may start earlier. Track mood symptoms carefully; they could be hormonal, not behavioral. One quick question—'When was her last period?'—can guide medical referrals and explain sudden behavior changes.