The Company of Biologists

Table 2.

Development of oocytes injected with spermatogenic cells derived from PGCs

		In vitro development (%)
Donor age (dpc)	Number of reconstituted eggs	One cell	Two cell	Four cell	Number of eggs transferred	Implantation sites (%)	Number of offspring (%)
8.5^{^*}	186	78 (41.9)	105 (56.5)	NA^{^†}	105	47 (25.2)	20 (10.8)
12.5	182	8 (4.4)	25 (13.7)	130 (71.4)	130	88 (48.3)	29 (15.9)

		In vitro development (%)
Donor age (dpc)	Number of reconstituted eggs	One cell	Two cell	Four cell	Number of eggs transferred	Implantation sites (%)	Number of offspring (%)
8.5^{^*}	186	78 (41.9)	105 (56.5)	NA^{^†}	105	47 (25.2)	20 (10.8)
12.5	182	8 (4.4)	25 (13.7)	130 (71.4)	130	88 (48.3)	29 (15.9)

Combined results using elongated spermatids and spermatozoa.

Combined results from two different recipient testes.

NA, not applicable because cells were transferred at the two-cell stage.