The studies on this project are currently focusing on developing a new method for tracking sperm during transport in the female reproductive tract. The preliminary studies have been conducted in rabbits, therefore no macaques were used on this project during the past year. The new methodology involves labeling ejaculated sperm with gadolinium. The labeled sperm are subsequently used for artificial insemination of a female and the sperm are monitored in the reproductive tract using MRI technology. Preliminary studies have demonstrated that rabbit sperm survive well for 16 h after labeling with gadolinium with only a modest reduction in percentage of motile sperm compared to unlabeled sperm. *KEY* Macaque, Sperm antigen, Immunocontraception

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Primate Research Center Grants (P51)
Project #
5P51RR000169-35
Application #
5219994
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
35
Fiscal Year
1996
Total Cost
Indirect Cost
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