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Embryonic demise is the most common event in the lives of women during theirs reproductive time with a rate of about 25%. The aim of this review is to outline the most important paraclinic and biological prognostic parameters. English language articles containing keywords like "embryonic demise", "predictive factors" which were searched using Medline and Pubmed. Systematic reviews, retrospective and prospective studies, clinical trials focused on this subject were selected. Informative value of the references of selected articles was used as base for further relevant headlines. Among the most significant reported predictive factors are the distance between the yolk sac (YS) and embryo, also known as the yalk stalk sign, the progesterone and β human chorionic gonadotropine levels. Low levels of biomarkers and abnormal appearance of gestational sac, crown-rump length and YS are considered worst prognostic factors and may lead to a poor outcome. [ABSTRACT FROM AUTHOR]

Aims. To characterize the vascularity of endometriotic cysts using color Doppler ultrasound and to differentiate more accurately between endometriotic cysts and other pelvic cyst masses. Methods. Two prospective studies were initiated: the first included 50 patients diagnosed with ovarian endometriotic cysts and 50 patients without gynecological pathology, in whom the resistance index (RI) of the uterine artery, ovarian artery and endometrial arcuate arteries in the early secretory phase was determined by endovaginal Doppler ultrasound; the second study included 50 patients diagnosed with ovarian endometriotic cysts, in whom the RI of the uterine artery, ovarian artery and cyst wall arteries in the late proliferative phase and in the late secretory phase was determined. Results. In the early secretory phase, the vascular flow through the uterine artery was significantly higher in patients with ovarian endometrioma. These patients had increased endometrial vascularity in the early secretory phase compared to the control group. In the late secretory phase, the vascular flow through the ovarian artery was higher compared to the late proliferative phase in patients with ovarian endometrioma. The vascularization of the ovarian endometrioma wall was significantly increased in the late secretory phase compared to the late proliferative phase. Conclusions. Vascularization, described through the arrangement of vessels, vascular density and vascular resistance, is an important factor in the evaluation of ovarian endometrioma. [ABSTRACT FROM AUTHOR]

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