a Gross of Bnc1+/+ Con (n = 3), Bnc1tr/tr Con (n = 3) and Bnc1tr/tr Fer-1 (n = 3) mice at 16 weeks old. b The ovary weights, body weights and ovarian weight coefficients of Bnc1+/+ Con (n = 4), Bnc1tr/tr Con (n = 6, p value = 0.0003 for ovary weight, p value = 0.4137 for body weight and p value = 0.0009 for ovary weight/body weight) and Bnc1tr/tr Fer-1 (n = 4, p value = 0.0077 for ovary weight, p value = 0.4395 for body weight and p value = 0.0068 for ovary weight/body weight) mice at 16 weeks old. c HE staining of PrFs, PFs, SFs, AFs and AtFs of Bnc1+/+ Con (n = 3), Bnc1tr/tr Con (n = 3, p value = 0.0073 for PrFs, p value = 0.3055 for PFs, p value = 0.3015 for SFs, p value = 0.3501 for AFs, p value = 0.0382 for AtFs, p value = 0.3957 for growing follicles and p value = 0.0002 for growing follicles/PrFs) and Bnc1tr/tr Fer-1 (n = 3, p value = 0.4860 for PrFs, p value = 0.8158 for PFs, p value = 0.2028 for SFs, p value = 0.4977 for AFs, p value = 0.0471 for AtFs, p value = 0.6138 for growing follicles and p value = 0.4052 for growing follicles/PrFs) mice at 16 weeks old. Scale bar = 200 μm. d Estrous cycles of Bnc1+/+ Con (n = 8), Bnc1tr/tr Con (n = 8, p value = 0.2186 for proestrus, p value = 0.1167 for estrus, p value = 0.2377 for metestrus and p value = 0.0073 for diestrus) and Bnc1tr/tr Fer-1 (n = 5, p value = 0.1956 for proestrus, p value = 0.5312 for estrus, p value = 0.0536 for metestrus and p value = 0.0108 for diestrus) mice. e Lipid ROS in Bnc1+/+ Con, Bnc1tr/tr Con (p value < 0.0001 for oxidized lipids, p value < 0.0001 for reduced lipids and p value = 0.0052 for oxidized/reduced lipids) and Bnc1tr/tr Fer-1 (p value = 0.0083 for oxidized lipids, p value < 0.0001 for reduced lipids and p value = 0.0006 for oxidized/reduced lipids) mouse GV oocytes at 16 weeks old. 3 independent experiments with total oocyte numbers >30 oocytes). f IHC of GPX4 and COX2 in Bnc1+/+ Con (n = 3), Bnc1tr/tr Con (n = 3) and Bnc1tr/tr Fer-1 (n = 3) mouse ovaries. The error bars indicate the mean values ± SDs, unpaired t test, two-tailed, *p value < 0.05, **p value < 0.01 and ***p value < 0.001. Source data are provided as a Source Data file.