Figure 1From: Medroxyprogesterone improves nocturnal breathing in postmenopausal women with chronic obstructive pulmonary diseaseStudy design. Both placebo (PL) and medroxyprogesterone acetate (MPA) periods lasted for 14 days. Arrows indicate the timing of sleep studies, dashed line the timing and duration of the placebo period and solid line thetiming and duration of the MPA period.Back to article page