Table 1.

Testicular function in mice deficient in estrogen biosynthesis or estrogen receptor protein

	Spermatogenesis	Steroidogenesis	Fertility	References
ARKOa	Affected	Affected	Affected	6,7
αERKOb	Affected	Affected	Affected	5
βERKOc	Normal	Normal	Normal	66
αβERKOd	Affected	Affected	Affected	64