Differential growth of human embryos in vitro: role of reactive oxygen species

Fertility and Sterility
Mohamed A BedaiwyAshok Agarwal

Abstract

To examine the relationship of early human embryonic development with the level of reactive oxygen species (ROS) in the culture media on the first day (day 1 ROS) after insemination. A prospective study. Patients undergoing assisted reproduction in a teaching hospital. Patients undergoing conventional IVF (n = 104; 115 cycles) and intracytoplasmic sperm injection (ICSI) (n = 91; 96 cycles) were included. Both fertilization and early cultures were performed in human tubal fluid with 5% serum substitute supplement. Day 1 ROS levels in the central well (sample) and the outer well (control) of each embryo culture dish were measured after overnight incubation by chemiluminescence assay using luminol as the probe. Fertilization rate and embryo quality at day 3 and 5 were recorded for each cycle. Age, parity, and demographic features were also compared. High day 1 ROS levels in culture media were associated with low blastocyst rate, low fertilization rate, low cleavage rate, and high embryonic fragmentation with ICSI but not with conventional IVF. High day 1 ROS levels in culture media were associated with lower pregnancy rates in both IVF and ICSI cycles. Reactive oxygen species generated in culture media by day 1 may be an important...Continue Reading

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Citations

Dec 7, 2005·Journal of Assisted Reproduction and Genetics·Xiaoyan ZhangTommaso Falcone
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