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Sumner Marshall, MD
University of California Medical Center San Francisco

JAMA. 1970;211(13):2157.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.—

In an excellent commentary on the effect of pregnancy and birth control pills in a case of surgically treated exstrophy of the bladder (210:1597, 1969), John K. Lattimer, MD, states that "with regard to contraceptive pills, while there is theoretical reason to worry about their increasing the flaccidity of the ureters, this has not yet been documented in clinical practice..." Reference might be made to the cases reported in the clinical note, "Ureteral Dilatation Following Use of Oral Contraceptives" (198:782, 1966). Results of experimental studies in animals and humans suggest that the "hydroureters of pregnancy" are secondary to both mechanical obstruction and hormonal influences, and that this ureteral dilatation can be produced by the progestogens contained in oral contraceptives. It is probable that the lesser amounts of progestogens contained in the newer oral contraceptives will decrease the chances of this occurrence. . . . [Full Text PDF of this Article]

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