Table 1.

Evaluation of spermatogenesis and fertility in W pup and adult recipient mice

^*R, right testis; L, left testis. 

^† P, pup; A, adult. 

^‡ Average weight of W pup recipient testes (61.1 ± 9.6 mg) was significantly greater than adult recipient testes (25.3 ± 1.4 mg, P < 0.0001). ND, not determined; 4819L was fibrous and could not be analyzed; 4870R was not injected with donor cells. 

^§ Days from transplantation to analysis. 

^¶ Seminiferous tubule cross sections with sperm heads were considered to be positive for complete spermatogenesis. Pup recipients had complete spermatogenesis in 77% of tubules compared to 31% for adult recipients. Values in parentheses are the number of cross sections with complete spermatogenesis over the total examined. 

^‖ Days from transplant to first progeny (fetuses or pups); NP, no progeny.