If you are planning to get pregnant and are suffering from hypertension, you had better work on your hypertension first!
Research at the Department of Psychiatry and Behavioral Sciences at the University of Washington has shown that women with hypertension before pregnancy had a 55-65% more chance of developing post-partum depression. The study was done on around 2300 women receiving prenatal care at a clinic in Seattle, Washington. The subjects were evaluated for depressive symptoms and the evidence of pre-existing hypertension. Previously, it was suspected that post-partum depression was linked to pregnancy-induced hypertension and pre-eclampsia. However, this study showed that there is no such link.