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To the Editor.
—The embryologic collection at the Johns Hopkins Medical School has now grown sufficiently large to be of great value to the medical profession. Over one hundred special papers on various topics in human embryology are based on this collection, and it is for this reason that I again appeal to physicians for more abortion specimens to help along the studies in this subject. Not only does this collection prove to be of value in the study of the anatomy of the human embryo, but it also sheds light on the cause of abortion, a question which concerns very much the general practitioner. In every hundred pregnancies there are about twenty abortions, among which there are seven pathologic ova and one monster. The clinical histories in these cases show that some sort of uterine disease produces the abortion, and for this reason it seems plain that the pregnancies
Mall FP. Request for Embryologic Specimens. JAMA. 1913;60(21):1655. doi:10.1001/jama.1913.04340210065027
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