Retrospective Analysis of the Incidence of Complications From Transvaginal Oocyte Retrieval (TVOR).

Ultrasound guided transvaginal oocyte retrieval (TVOR) is nowadays gold standard techniques to collect oocyte after ovulation induction in Assisted Reproductive techniques (ART). It is a very safe technique with infectious complications of any kind occurring in just 1% (Bennett et al.) of all procedures, vaginal bleeding in 0 to 1.3% of the procedures (Ludwig et al., Bodri et al., Aragona et al.) and vascular, gastrointestinal and genitourinary (Grynberg et al. and Catanzarite and al.), injuries being extremely rare (Bennett et al.). Case reports account also for rarer complications such as ovarian abscess formation (Kelada & Ghan and Sharp et al.) pseudoanerysm formation (Bozdag et al. and Jayakrishnan et al.), uroretroperitoneum (Fiori et al.).

The rational of thestudy is to provide the percentages of complication from TVOR of the Fertility Center of Humanitas Research Hospital, also considering the development in time of technologies and techniques in Assisted Reproduction. Another rational is inquire whether there is any risk factor for such complications in order to try to prevent them in future procedures. The investigators performed a retrospective observational study including all the transvaginal oocyte retrieval procedures performed between 1996 and October 2016.

The data have been collected from the Humanitas Fertility Center' Department database (ART.it). Because of the retrospective nature of this study, a specific informed consent was not necessary.