As estrogen falls, the balance between estrogen and androgens shifts, and for many women that shows up as gradual thinning across the crown and part line - the female pattern - rather than the receding hairline men see. Hair may also feel finer or shed more during the transition.
This is genuinely common and genuinely distressing, and it is one of the menopause changes women are least warned about. It is also not the only possible cause of thinning at this age, which matters for getting it treated correctly.

