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Nonsurgical embryo transfer in the common marmoset monkey
V S Marshall1, J Kalishman, J A Thomson
1Wisconsin Regional Primate Research Center, University of Wisconsin, Madison 53715-1299, USA.
Journal of Medical Primatology
|January 23, 1998
Summary
Asynchronous embryo transfer in marmosets significantly improved pregnancy rates and live births compared to synchronous transfer. This breakthrough aids primate developmental research and conservation efforts for endangered Callithrichid species.
Area of Science:
- Reproductive Biology
- Primate Research
- Developmental Biology
Background:
- Nonsurgical embryo transfer is crucial for reproductive technologies in primates.
- Common marmosets are vital models for studying primate reproduction and development.
- Optimizing embryo transfer protocols is essential for both research and conservation.
Purpose of the Study:
- To develop and evaluate a nonsurgical embryo transfer technique in common marmosets.
- To compare the efficacy of synchronous (ST) versus asynchronous (AT) embryo transfer methods.
- To assess the potential of this technique for advancing primate developmental studies and conservation.
Main Methods:
- Developed a nonsurgical embryo transfer technique for common marmosets.
- Implemented two transfer protocols: synchronous (ST) and asynchronous (AT).
- Synchronous transfers: donor and recipient ovulated on the same day (5-8 days post-ovulation).
- Asynchronous transfers: donor ovulated at least 2 days prior to the recipient (recipient 2-4 days, donor 6-8 days post-ovulation).
Main Results:
- Asynchronous transfers (AT) resulted in significantly higher pregnancy rates (44%, 4/9) and live births (35%, 6/17 infants) compared to synchronous transfers (ST) (9%, 1/11 pregnancies; 0%, 0/22 infants).
- Pregnancies from ST were lost by Day 40 of gestation, whereas AT resulted in three term pregnancies.
- The difference in infant survival between AT and ST was statistically significant (p < 0.005).
Conclusions:
- Asynchronous nonsurgical embryo transfer is a highly effective method for establishing pregnancies in common marmosets.
- This technique provides a valuable tool for experimental analysis of primate postimplantation development.
- The developed method offers a promising approach for the conservation of endangered Callithrichid species.