About half of pregnancies that had a history of high blood pressure in a previous pregnancy will have a subsequent pregnancy complicated by high blood pressure, small baby, diabetes in pregnancy or liver problems.
Reference: Nzelu D, Dumitrascu-Biris D, Hunt KF, Cordina M, Kametas NA. Pregnancy outcomes in women with previous gestational hypertension: A cohort study to guide counselling and management. Pregnancy hypertension. 2018 Apr 1;12:194-200.