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Recognition of the features of gestational endometrium, trophoblast, and villi, as well as the pathologic changes in chorionic tissues, is an important part of endometrial biopsy interpretation. The presence of intrauterine products of conception generally excludes the diagnosis of ectopic pregnancy and can help explain other pathologic states such as abnormal bleeding or chronic endometritis.

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Mazur, M.T., Kurman, R.J. (2005). Pregnancy, Abortion, and Ectopic Pregnancy. In: Diagnosis of Endometrial Biopsies and Curettings. Springer, New York, NY. https://doi.org/10.1007/978-0-387-26321-2_3

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  • DOI: https://doi.org/10.1007/978-0-387-26321-2_3

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