KUMULATIVNA STOPA TRUDNOĆA OSTVARENA NAKON PRIJENOSA ZAMETAKA U SVJEŽEM CIKLUSU I PRVOM NAREDNOM CIKLUSU S ODMRZNUTIM ZAMETCIMA: JE LI VRIJEME ZA PROMJENU PRAKSE?

Abstract

The aim: was to clarify parameters that contribute to successful pregnancy outcomes from one oocyte retrieval cycle with the least procedure steps. Methods: This retrospective study included 42 stimulated IVF cycles with fresh embryo transfers (fresh ET) and the subsequent 42 frozen embryo transfer cycles (FET) performed between January 2012 and December 2015. Results: The observed clinical pregnancy rate of 21.4% in stimulated cycles with fresh embryo transfers was significantly lower compared with the pregnancy rate of 52.4% in cycles with thawed embryo transfers (p=0.015) indicating impaired endometrium quality in stimulated IVF cycles. Most of the patients (78.6%) failed to achieve pregnancy after fresh ET, but more than half of them (57.6%) succeeded to achieve pregnancy after FET. The cumulative pregnancy rate after fresh ET and the first subsequent FET was 73.8% per initiated cycle. Conclusion: The results suggest that not only the presence of supernumerary good-quality blastocysts but also a receptive endometrium is needed for a successful IVF outcome. Our findings suggest that ovarian stimulation protocol had an impact on the pregnancy rate in the fresh cycle and that a better chance of conceiving was after FET. Thus, IVF outcomes can be improved with a better embryo transfer strategy.Cilj rada je razjasniti parametre koji pridonose uspješnom ostvarivanju trudnoće iz jednog započetog postupka prikupljanja jajnih stanica uz najmanji broj postupaka koji slijede. Metode: U retrospektivnu studiju uključeno je 42 stimulirana IVF ciklusa s prijenosom svježih zametaka (“svježi ET”) i 42 ciklusa prijenosa kriopohranjenih zametaka (“FET”) učinjenih između siječnja 2012. i prosinca 2015. Rezultati: Zabilježena je značajno niža stopa kliničkih trudnoća (p=0,015) nakon prijenosa svježih zametaka u stimuliranim ciklusima (21,4 %) u usporedbi sa stopom trudnoća nakon prijenosa odmrznutih zametaka (52,4 %) što ukazuje na smanjenu kvalitetu/receptivnost endometrija u stimuliranim IVF ciklusima. Ukupna, kumulativna stopa trudnoća nakon “svježeg ET” i FET postupka iznosila je 73,8 % po započetom ciklusu. Zaključak: Rezultati ukazuju da je osim kvalitetnih blastocisti za uspješnost IVF postupka nužan i receptivni endometrij. Uočen je utjecaj protokola stimulacije jajnika u svježem ciklusu na stopu trudnoća i veća uspješnost začeća nakon FET postupka. Stoga bi se uspješnost IVF postupka mogla poboljšati boljom strategijom prijenosa zametak

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