C R Sacha1, D J Kaser1, L V Farland1,2, S Srouji1, S A Missmer1,2, C Racowsky3. 1. Department of Obstetrics & Gynecology, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA. 2. Department of Epidemiology, Harvard T. H. Chan School of Public Health, 677 Huntington Ave, Boston, MA, 02115, USA. 3. Department of Obstetrics & Gynecology, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA. cracowsky@bwh.harvard.edu.
Abstract
PURPOSE: We examined whether short-term exposure to in vitro maturation (IVM) medium of cumulus-oocyte complexes (COCs) from a stimulated cycle increases the yield of metaphase II (MII) oocytes and usable embryos. METHODS: Retrospective review of two consecutive autologous IVF/ICSI cycles per patient between 2007 and 2015 in which cycle 1 did not result in live birth. Patients with short-term exposure of COCs to IVM medium (3-5 h before standard insemination or ICSI) in cycle 2 (treated) were matched 1:4 on %MI and %MII to patients without use of IVM in cycle 2 (untreated). The proportions of mature oocytes, two pronucleate (2PN) zygotes, number of usable embryos, and clinical outcomes were compared between groups with regression modeling. RESULTS: The treated (n = 43) and untreated (n = 163) groups had similar demographic characteristics and similarly high proportions of immature oocytes (48.2 vs. 41.3%, respectively) in cycle 1. There were no significant differences between the treated and untreated groups in the change in %MII (48.1 to 68.9% vs. 50.5 to 72.5%, respectively) or mean number of usable embryos (2.2 to 3.4 vs. 2.0 to 3.3, respectively) from cycle 1 to cycle 2. CONCLUSIONS: These findings suggest that short-term IVM incubation of COCs may not provide any additional benefit in patients with a prior unsuccessful cycle notable for a high proportion of immature oocytes. Further randomized studies are warranted to determine whether there is a subset of patients who may have improved clinical outcomes with this "rescue IVM" intervention.
PURPOSE: We examined whether short-term exposure to in vitro maturation (IVM) medium of cumulus-oocyte complexes (COCs) from a stimulated cycle increases the yield of metaphase II (MII) oocytes and usable embryos. METHODS: Retrospective review of two consecutive autologous IVF/ICSI cycles per patient between 2007 and 2015 in which cycle 1 did not result in live birth. Patients with short-term exposure of COCs to IVM medium (3-5 h before standard insemination or ICSI) in cycle 2 (treated) were matched 1:4 on %MI and %MII to patients without use of IVM in cycle 2 (untreated). The proportions of mature oocytes, two pronucleate (2PN) zygotes, number of usable embryos, and clinical outcomes were compared between groups with regression modeling. RESULTS: The treated (n = 43) and untreated (n = 163) groups had similar demographic characteristics and similarly high proportions of immature oocytes (48.2 vs. 41.3%, respectively) in cycle 1. There were no significant differences between the treated and untreated groups in the change in %MII (48.1 to 68.9% vs. 50.5 to 72.5%, respectively) or mean number of usable embryos (2.2 to 3.4 vs. 2.0 to 3.3, respectively) from cycle 1 to cycle 2. CONCLUSIONS: These findings suggest that short-term IVM incubation of COCs may not provide any additional benefit in patients with a prior unsuccessful cycle notable for a high proportion of immature oocytes. Further randomized studies are warranted to determine whether there is a subset of patients who may have improved clinical outcomes with this "rescue IVM" intervention.
Entities:
Keywords:
IVF; In vitro maturation; Maturity; Oocytes
Authors: Gayle M Jones; David S Cram; Bi Song; M Cristina Magli; Luca Gianaroli; Orly Lacham-Kaplan; Jock K Findlay; Graham Jenkin; Alan O Trounson Journal: Hum Reprod Date: 2008-03-17 Impact factor: 6.918
Authors: Huixia Yang; Thomas Kolben; Sarah Meister; Corinna Paul; Julia van Dorp; Sibel Eren; Christina Kuhn; Martina Rahmeh; Sven Mahner; Udo Jeschke; Viktoria von Schönfeldt Journal: Biomedicines Date: 2021-12-14