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Effect of Conjugated Estrogens on the Coagulation Mechanism

Joseph J. McGovern, M.D.; John P. Bunker, M.D.; Robert Goldstein, M.D.; Joseph W. Estes, M.D.

JAMA. 1961;175(11):1011-1012. doi:10.1001/jama.1961.63040110012021b.

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ABSTRACT

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IT HAS BEEN reported that the intravenous injection of conjugated estrogens (Premarin) is useful in the control of surgical bleeding in man.¹ It has also been reported that in dogs² the intravenous injection of conjugated estrogens is followed within 2 hours by significant elevation of factor V (labile factor) and prothrombin. There are no published data on the effect of intravenously administered conjugated estrogens on the coagulation system in human beings, although some authors have suggested that there may be a beneficial effect.^{1, 3} In the present report the effect of intravenously given conjugated estrogens on these and other factors in normal man is investigated.

Methods Blood was obtained by venipuncture using the 2-syringe technique. Prothrombin times were determined by the Quick one-stage method.⁴ The percentage activity was determined from a dilution curve of normal plasma using aluminum hydroxide-absorbed normal plasma as the diluent. Factor V

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McGovern JJ, Bunker JP, Goldstein R, Estes JW. Effect of Conjugated Estrogens on the Coagulation Mechanism. JAMA. 1961;175(11):1011-1012. doi:10.1001/jama.1961.63040110012021b.

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