Additionally, in 2003 a retrospective cohort study of 3593 women from Scotland also noted an increased incidence of hypertension in women with prior hypertension during pregnancy. A large meta-analysis by Bellamy et al.22 in 2007 examined multiple prospective and retrospective cohort studies dating as far back as the 1960s, and found an increased risk of developing hypertension after a hypertensive pregnancy (RR: 3.39, 95% CI: 2.7–5.0).