Appearance of ovarian mast cells in MRL/MpJ and C57BL/6N mice, and F1 and F2 intercross mice at postnatal day 0.

<p>(A–F) Toluidine blue-stained sections of ovaries in (A) MRL/MpJ, (B) C57BL/6N, (C) MRLB6F1, (D) reciprocal F1 (B6MRLF1), (E) MRLB6F2, and (F) reciprocal F2 (B6MRLF2). Bars: 100 µm. (G) Number of mast cells per total ovarian area (OMC density). (H) Number of mast cells facing ovarian surface epithelium per total ovarian area (SEMC density). (I) Ratio of SEMC density to OMC density (SEMC ratio). Data represent mean ± SEM (n = 10–20 per group). Significant differences were analysed using Scheffé’s method following the Kruskal-Wallis test. Statistical significance is indicated by different letters (<i>P</i> < 0.05).