Table 3.

Serum levels of luteinizing hormone (LH), estradiol (E2), and progesterone (P4) at the time of sample collection (6:00 pm) in female mice at different stages of the estrous cycle

	LH (mIU/mL)		E2 (pg/mL)		P4 (ng/mL)
	Mean	SEM	Mean	SEM	Mean	SEM
Metestrus	5.66	0.19	3.77	0.35	1.99	0.20
Diestrus	4.96	0.33	2.59	0.38	5.89	1.84
Proestrus	9.78*	0.43	7.75*	0.55	4.08	0.67
Estrus	5.79	0.44	3.74	0.39	2.49	0.37

*Significant difference vs. all other stages, P < 0.0001