Effect of variable concentration of serum on mouse embryo development

Area of Science:

• Reproductive biology
• Developmental biology
• In vitro fertilization (IVF) research

Background:

• Serum supplementation is commonly used in embryo culture media.
• The precise optimal concentration of serum for maximal embryo development requires further investigation.

Purpose of the Study:

• To determine the optimal serum concentration for maximal mouse embryo development in vitro.
• To evaluate the effects of varying serum concentrations on embryo growth, blastomere number, sister chromatid exchange (SCE), and chromosomal aberrations.

Main Methods:

• Mouse embryos were cultured in vitro with serum concentrations ranging from 0% to 30% for 96 hours.
• Embryo growth was assessed at 72 and 96 hours.
• Post-culture analysis included blastomere number, SCE, micronuclei, and chromosomal aberrations after a 29-hour culture period.

Main Results:

• Embryo growth was significantly improved with 5%, 10%, 20%, and 30% serum compared to Ham's F-10 medium alone.
• All tested serum concentrations reduced sister chromatid exchange (SCE) rates.
• Lower SCE rates were observed with 10%, 20%, and 30% serum compared to 5% serum.

Conclusions:

• Serum supplementation is essential for optimal mouse embryo development.
• A minimum serum concentration of 10% is necessary to achieve optimal conditions for embryo development.
• Serum supplementation positively impacts embryo growth and reduces chromosomal instability markers like SCE.