title: Effects of age and body mass of recipients on survival of transferred embryos in mice.
abstract: To examine the effects of age and body mass of recipients on embryo survival during gestation, ICR embryos were transferred to nulli- or primi-parous females of 4 strains of mice. Out of 530 recipients, 383 (72.3%) produced a litter. Transfer of 3,465 embryos to 383 recipients resulted in production of 1,637 pups born alive, an overall rate of embryo survival of 47.2 +/- 1.1%. Regression analyses revealed that embryo survival decreased in older recipients and increased in heavier recipients. The results were consistent in each parity/strain group and all groups combined.
authors.affiliation: Animal Research Centre, Agriculture Canada, Ottawa.
authors.forename: K
authors.initials: K
authors.lastname: Nonaka
authors.forename: H
authors.initials: H
authors.lastname: Sasada
authors.forename: J
authors.initials: J
authors.lastname: Nagai
mesh_terms: D000367:Age Factors; D000818:Animals; D001835:Body Weight; D004624:Embryo Transfer / Q000662:veterinary*; D005260:Female; D005328:Fetal Viability; D051379:Mice; D008813:Mice, Inbred ICR / Q000502:physiology*; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000502:physiology*