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Summary. Plasma dopamine p-hydroxylase (DBH) activity was estimated in non-pregnant women, normotensive pregnant women during the third trimester and women with pregnancy-induced hypertension (PIH). Nonpregnant women from a high income group had significantly higher DBH activity than their low income counterparts. DBH activity was significantly elevated in women with PIH when compared with non-pregnant and normal pregnant women from a low income group, but was lower than the level in well-nourished, non-pregnant normotensive women.