Background Hypertensive disorders of pregnancy, gestational diabetes, and having a small-for-gestational-age baby are known to substantially increase a woman's risk of cardiovascular disease. Despite this, evidence for models of care that mitigate cardiovascular disease risk in women with these pregnancy-related conditions is lacking. Methods and Results A 6-month prospective cohort study assessed the effectiveness of a multidisciplinary Women's Heart Clinic on blood pressure and lipid control in women aged 30 to 55 years with a past pregnancy diagnosis of hypertensive disorders of pregnancy, gestational diabetes, or a small-for-gestational age baby in Melbourne, Australia. The co-primary end points were (1) blood pressure <140/90 mm Hg or <130/80 mm Hg if diabetes and (2) total cholesterol to high-density lipoprotein cholesterol ratio <4.5. The study recruited 156 women with a mean age of 41.0±4.2 years, 3.9±2.9 years from last delivery, 68.6% White, 20.5% South/East Asian, and 80.5% university-educated. The proportion meeting blood pressure target increased (69.2% to 80.5%, =0.004), with no significant change in lipid targets (80.6% to 83.7%, =0.182). Systolic blood pressure (-6.9 mm Hg [95% CI, -9.1 to -4.7], <0.001), body mass index (-0.6 kg/m [95% CI, -0.8 to -0.3], <0.001), low-density lipoprotein cholesterol (-4.2 mg/dL [95% CI, -8.2 to -0.2], =0.042), and total cholesterol (-4.6 mg/dL [95% CI, -9.1 to -0.2] =0.042) reduced. Heart-healthy lifestyle significantly improved with increased fish/olive oil (36.5% to 51.0%, =0.012), decreased fast food consumption (33.8% to 11.0%, <0.001), and increased physical activity (84.0% to 92.9%, =0.025). Conclusions Women at high risk for cardiovascular disease due to past pregnancy-related conditions experienced significant improvements in multiple cardiovascular risk factors after attending a Women's Heart Clinic, potentially improving long-term cardiovascular disease outcomes. Registration URL: https://www.anzctr.org.au; Unique identifier: ACTRN12622000646741.