title: Use of G1.2/G2.2 media for commercial bovine embryo culture: equivalent development and pregnancy rates compared to co-culture.
abstract: The expanded application of commercial bovine IVM, IVF, and IVC systems is dependent on the ability to produce embryos in culture that are capable of producing normal pregnancies. Because serum containing culture systems can induce neonatal and fetal problems there exists a definite need for a serum-free culture system that produces viable blastocysts. This study demonstrated that the physiological sequential media system G1.2/G2.2 could produce bovine blastocysts at rates equivalent to co-culture. Additionally, these blastocysts had equivalent or increased cell numbers and inner cell mass development. Blastocysts produced in the G1.2/G2.2 culture system produced pregnancies following both fresh transfer and cryopreservation at equivalent rates to co-culture. Finally, this study demonstrated that the media system G1.2/G2.2 could be used in a commercial OPU transfer program without any loss in the numbers of blastocysts produced or the numbers of pregnancies resulting following transfer from either fresh or cryopreserved blastocysts.
authors.affiliation: Research and Development Department, Colorado Center for Reproductive Medicine, 799 East Hampden Avenue, Suite 520, Englewood, CO 80110, USA. mlane@colocrm.com
authors.forename: Michelle
authors.initials: M
authors.lastname: Lane
authors.forename: David K
authors.initials: DK
authors.lastname: Gardner
authors.forename: Marilyn J
authors.initials: MJ
authors.lastname: Hasler
authors.forename: John F
authors.initials: JF
authors.lastname: Hasler
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000502:physiology; D002417:Cattle / Q000196:embryology*; D018920:Coculture Techniques; D015925:Cryopreservation / Q000662:veterinary; D003470:Culture Media; D046508:Culture Techniques; D004624:Embryo Transfer / Q000662:veterinary; D004622:Embryo, Mammalian / Q000502:physiology*; D005260:Female; D005307:Fertilization in Vitro / Q000662:veterinary; D016015:Logistic Models; D011247:Pregnancy
chemical_list: D003470:Culture Media