Fig. 1

Blood pressure patterns in pregnancy stratified for women with singleton and twin pregnancies. a Change in systolic blood pressure in mmHg in women with singleton and twin pregnancies based on repeated measurements analyses. Data represent the unadjusted blood pressure pattern. Systolic blood pressure = β0 + β1 * pregnancy outcome + β2 * gestational age + β3 * gestational age ^ -2 + β4 * pregnancy outcome * gestational age. Women with the use of antihypertensive medication were excluded for blood pressure analyses (n = 11). b Change in diastolic blood pressure in mmHg in women with singleton and twin pregnancies based on repeated measurements analyses. Data represent the unadjusted blood pressure pattern. Diastolic blood pressure = β0 + β1 * pregnancy outcome + β2 * gestational age + β3 * gestational age ^ 0.5 + β4 * pregnancy outcome * gestational age. Women with the use of antihypertensive medication were excluded for blood pressure analyses (n = 11)