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East Afr Med J. 1995 Nov;72(11):690-3.

Low dose aspirin in prevention of pregnancy-induced hypertension in primigravidae at the Muhimbili Medical Center, Dar es Salaam.

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T.M.J. Medical Clinic, Dar es Salaam, Tanzania.


There is evidence that aspirin in low doses favourably influences the course and outcome of pregnancy in women at risk of developing pregnancy-induced hypertension. We conducted a double blind prospective randomized study to investigate the effect of low dose aspirin in preventing pregnancy-induced hypertension. Two hundred and one primigravidae from twenty weeks of pregnancy and above were screened using the roll-over test. Of the 127 women with an increase in blood pressure during the roll-over test, 126 women entered the study and were treated with a daily dose of either aspirin (80 mg) or placebo up to 10 days before the expected date of delivery. Samples of urine were collected for detection of aspirin. The incidence of pregnancy-induced hypertension in the aspirin treated group was significantly lower than in the placebo treated group; 3.17% versus 15.9% with a p value of 0.02. It is concluded that low daily doses of aspirin taken from twenty weeks of pregnancy significantly reduce the incidence of pregnancy-induced hypertension, possibly through the correction of an imbalance in levels of thromboxane and prostacyclin.

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