Hi Estelle! yup estrogen hormones helps to hold the hair in growing phase (anagen) for longer period of time which is about 2 to 7 years. With menupause as the level of estrogen hormones drops more hair follicle enters to resting phase (catagen) of hair cycle which lasts for about 2 to 4 weeks. The hair than enters talogen phase and starts shedding. Thus if the symptom are more prominent you may want to undergo hormone replacement therapy.