vs. 0.7cm), the length of the implanting part of gestational mass in the lower segment (3.3cm vs. 1.2cm), the minimum thickness of remaining lower uterine myometrium (0.08cm vs. 0.20cm), the lower segment protrusion rate (60% vs. 5.7%), the fetus CRL (1.7cm vs. 0.7cm) and the CDFI grading were significantly different between case and control group. As for clinical prognosis, the patients of case group experienced higher ratio of CSP lesion resection under open surgery or laparoscopy (35% vs. 2.86%), more blood loss in surgery (35ml vs. 20ml) and more hospitalisation days (7.5d vs. 3.5d) than control group. Conclusions: Lacunar-like change of chorion can be detected in early gestation, the sonography and clinics were different between case and control group, it is a predictor of worse clinical outcome.
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