This within-person, crossover, 3-condition, placebo-controlled study compares the impact of
three perimenstrual conditions on severity of suicidal symptoms in females with past-month
suicidality but minimal risk of imminent suicide attempt. The three conditions are (1)
perimenstrual withdrawal from estradiol only (during progesterone stabilization), (2)
perimenstrual withdrawal from progesterone only (during estradiol stabilization), and (3)
perimenstrual withdrawal from both estradiol and progesterone during placebo.