title: Comparison of blastocyst and Sage media for in vitro maturation of human immature oocytes.
abstract: In vitro maturation (IVM) of human oocytes is an attractive alternative to conventional assisted reproductive technology (ART) treatment, as it involves no or minimal ovarian stimulation. Currently, commercialized media specifically designed for IVM are often used. These media are expensive, have limited shelf life, and must be ordered in advance. If standard culture media can be used in place of the specialized IVM media, it would simplify management and make IVM more feasible and more widely employed in ART centers around the world, especially in developing countries where resources are scarce. This study was, therefore, conducted to test the hypothesis that blastocyst medium was as good as commercial IVM medium to support maturation and developmental competence of human immature oocytes as previously shown in the mouse system. Immature oocytes were obtained by needle aspiration from 89 pregnant women during cesarean deliveries between April 2012 and February 2013. Sibling oocytes were allocated to Sage IVM media (512 oocytes) or blastocyst medium (520 oocytes) and assessed for maturation 36 hours later. Mature oocytes were inseminated by intracytoplasmic sperm injection and cultured up to 144 hours. There was no difference in maturation rate (65.0% vs 68.7%; P = .218) or fertilization rate (66.9% vs 66.4%; P = .872) of oocytes matured in vitro in both media. There was also no difference in the formation of good-quality blastocysts (46.6% vs 45.9%; P = .889) in the 2 groups. Further study should be done to ascertain implantation and pregnancy potential of these embryos.
authors.affiliation: Department of Obstetrics and Gynecology, Buddhachinaraj Hospital Medical School, Phitsanulok, Thailand.
authors.forename: Pallop
authors.initials: P
authors.lastname: Pongsuthirak
authors.affiliation: Department of Obstetrics and Gynecology, Division of Reproductive Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Sorramon
authors.initials: S
authors.lastname: Songveeratham
authors.affiliation: Department of Obstetrics and Gynecology, Division of Reproductive Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand tvutyava@med.cmu.ac.th.
authors.forename: Teraporn
authors.initials: T
authors.lastname: Vutyavanich
mesh_terms: D000293:Adolescent; D000328:Adult; D001757:Blastomeres / Q000502:physiology*; D018929:Cell Culture Techniques; D003470:Culture Media; D046149:Embryo Culture Techniques; D005260:Female; D006801:Humans; D059471:In Vitro Oocyte Maturation Techniques / Q000379:methods*; D009865:Oocytes / Q000502:physiology*; D011247:Pregnancy; D020554:Sperm Injections, Intracytoplasmic; D013997:Time Factors; D055815:Young Adult
chemical_list: D003470:Culture Media
keywords: blastocyst medium; immature oocytes; in vitro maturation; in vitro maturation medium