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Updated: Aug 10, 2026

In Vivo Real-Time Study of Drug Effects on Carotid Blood Flow in the Ovine Fetus
Published on: April 28, 2023
Antihypertensive treatment with the adrenergic beta-receptor blocker metoprolol during pregnancy
In 101 hypertensive gravidae the selective beta-blocking agent metoprolol alone or in combination with hydralazine has been used. The effects of the mother and fetus have been compared with those of 97 hypertensive gravidae treated with hydralazine. In both groups a small dose of a thiazide was added. Perinatal mortality was lower in the metoprolol group (2.0%) than in the hydralazine group (8.0%). The rate of fetal growth retardations also was lower when using metoprolol (11.7 and 16.3% respectively). No abnormal effects of the beta-blocker was noticed on the fetus.
In 101 hypertensive gravidae the selective beta-blocking agent metoprolol alone or in combination with hydralazine has been used. The effects of the mother and fetus have been compared with those of 97 hypertensive gravidae treated with hydralazine. In both groups a small dose of a thiazide was added. Perinatal mortality was lower in the metoprolol group (2.0%) than in the hydralazine group (8.0%). The rate of fetal growth retardations also was lower when using metoprolol (11.7 and 16.3% respectively). No abnormal effects of the beta-blocker was noticed on the fetus.
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