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Extrauterine Implantation and Involution of Implantation Site

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Benirschke's Pathology of the Human Placenta
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Abstract

The blastocyst normally implants within the uterine cavity. An ectopic pregnancy refers to the implantation of an embryo outside of the uterus. Implantation at any of these ectopic sites is effectively part of the placenta accreta spectrum. Following cessation of pregnancy, morphological changes in the placental site that played a physiologic role in supporting development of the fetus and placenta during pregnancy are transformed back to a nonpregnant cyclical endometrium.

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Khong, T.Y., Charles, A. (2022). Extrauterine Implantation and Involution of Implantation Site. In: Baergen, R.N., Burton, G.J., Kaplan, C.G. (eds) Benirschke's Pathology of the Human Placenta. Springer, Cham. https://doi.org/10.1007/978-3-030-84725-8_13

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