Table 1.

Differences in serum sex steroid levels in mice ($\overline{X}$ ± S, n = 6).

Sex steroid	E2 (Pg/mL)	Test (nmol/L)	Prolactin (ng/mL)	Progesterone (ng/mL)
Female	29.33 ± 3.27	1.46 ± 0.72	234.83 ± 15.89	33.35 ± 11.13
Male	22.67 ± 2.88	9.62 ± 7.51	225.00 ± 15.30	22.14 ± 8.80
P value	0.004	0.004	0.326	0.093