В Ма-ме хорошие среды как раз для доращивания до бластоцист. Витролайф и Кук  имеют одинаковые результаты по  использованию. Спорить на эту тему, все равно что рассуждать что лучше Мерседес или БМВКто знает английский, читайте, можно не спорить.Zollner KP, Zollner U, Schneider M, Dietl J, Steck T.Department of Obstetrics and Gynecology, University of Würzburg, Germany. zollner_u@klinik.uni-wuerzburg.deAbstractBACKGROUND: Optimal culture conditions are crucial for embryonic development and blastocyst formation after in vitro fertilization (IVF) or Intracytoplasmic sperm injection (ICSI). A prospective randomized trial was carried out to compare the effects of two different sequential media (Vitrolife and MediCult) on embryo development and implantation.MATERIAL/METHODS: 176 couples were included in this prospective randomized study. All couples undergoing the IVF (n=84) or ICSI (n=92) program at the University of Würzburg were randomly assigned to either Vitrolife (n=87) or MediCult (n=89) sequential culture media.RESULTS: The overall median fertilization rate (FR) was 84.0% and was similar in the Vitrolife (FR=87.5%) and MediCult group (FR=80.0%). A mean of 2.7 embryos were replaced into the uterus, not significantly different between both groups. The pronuclear development was significantly enhanced in embryos cultured in Vitrolife than in those cultured in MediCult media (p=0.035). The embryonic development on day 3 was also superior in the Vitrolife group, but only in ICSI cycles (p<0.01). After 5 days of culturing, the blastocyst development was equivalent in both groups. The clinical pregnancy rate was 31.0% per transfer in the Vitrolife group and 28.1% in the MediCult group (not significant).CONCLUSIONS: The results demonstrate that implantation and clinical pregnancy rates with both media are comparable. Embryonic development until day three seemed to be enhanced when the embryos were cultured in Vitrolife media.Optimale Kulturbedingungen stellen eine unverzichtbare Grundlage für die embryonale Entwicklung nach assistierter Reproduktion dar. Zwei häufig verwendete und kommerziell erhältliche sequenzielle Kulturmedien sind die Medien BlastAssist M1/M2 (MediCult) und G1.2/G2.2 (Vitrolife). Gegenstand der vorliegenden prospektiv-randomisierten Studie war der Vergleich dieser Kulturmedien für die Kultur menschlicher Embryonen nach In-vitro-Fertilisation und intrazytoplasmatischer Spermieninjektion.In die Studie wurden 176 Paare eingeschlossen, 89 Paare wurden durch Randomisierung den MediCult-Medien, 87 Paare den Vitrolife-Medien zugeordnet.Während der frühen embryonalen Entwicklung bis Tag 3 zeigten sich in der Vitrolife-Gruppe signifikant bessere Ergebnisse als in der MediCult-Gruppe, die sich jedoch im weiteren Verlauf egalisierten. Die Kulturmedien erbrachten in Bezug auf die Blastozystenentwicklung, die Implantations- und die Schwangerschaftsrate vergleichbare Ergebnisse. Aufgrund der ähnlichen Schwangerschaftsraten sind beide Kultursysteme als gleichwertig einzustufen. Abstract in English: Optimal culture conditions are crucial for embryonic development after assisted reproduction. BlastAssist M1/M2 (MediCult) and G1.2/G2.2 (Vitrolife) are two sequential culture media that are often used and commercially available. A prospective randomized trial was performed to compare these two culture media for culture of human embryos after in-vitro fertilization and intracytoplasmatic sperm injection.176 couples were included in the study, 89 couples were randomized to the MediCult media, 87 to the Vitrolife media. The Vitrolife group showed significant better results in the early embryonic development until day 3 than the MediCult group. Later development was similar in both groups. The results of blastocyst development, implantation and pregnancy rates were comparable in both groups. Since both culture systems showed equivalent pregnancy rates, they can be equally used.