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Re: gonadal dose risk



November 1, 1999

The most sensitive stage of spermatogenesis is the A/B spermatogonia stage
which occurs about eight weeks before the final development of mature
sperm. The sperm obtained five days after irradiation are less likely to be
affected that the sperm collected eight weeks after irradiation. Based on
the atomic bomb survivors' data, the sperm produced more than six months
after irradiation are the least likely to be affected.

Otto

		*****************************************************
		Prof. Otto G. Raabe, Ph.D., CHP
              Institute of Toxicology & Environmental Health (ITEH)
		   (Street address: Building 3792, Old Davis Road)
		University of California, Davis, CA 95616
		Phone: 530-752-7754  FAX: 530-758-6140
		E-mail ograabe@ucdavis.edu
              *****************************************************
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