STUDY QUESTION Does the type of media used to culture embryos for IVF influence the birthweight and length of neonates? SUMMARY ANSWER No significant differences were observed in birthweight and length among the three embryo culture media used for in vitro embryo culture. WHAT IS KNOWN ALREADY Since the establishment of IVF as an assisted reproductive technology (ART), many different cultur...

Approximately 390 literature references (through spring 1986) were reviewed for mammalian whole embryo culture procedures, with particular attention to the development of those cultures as systems for teratogenicity testing. The existing procedures could be conveniently divided into three groups, which are defined by the periods of embryogenesis that they embrace: preimplantation, peri-implanta...

The DNA:protein ratio and enzyme patterns of four spontaneous mouse tumors (one male and one female mammary carcinoma, a muscle sarcoma, and a uterine fibrosarcoma) were determined. Tissue culture cell lines established from these tumors and from mouse embryo and human embryo lung tissues showed quantitative changes in DNA:protein ratio and most of the 13 enzymes studied. Although there were wi...