Immunohistochemical analysis for ovarian tissues in intact or VOAT mice. Expressions of CYP11A1 (a, c) and CD34 (b, d) in the corpus luteum of mice with uteri showing decidualization on day 8 of pseudopregnancy. a, b Intact mice, c, d VOAT mice. A Antral follicle, CL corpus luteum. Bar 200 μm