In Jane Eyre it is certain that the number of women over rides the number of men; however, in the novel you will notice that mothers are limited. There are adoptive motherly figures, for example Miss Temple and Mrs Fairfax, but the only true mother that we see (alive) is Mrs Reed, and quite simply - she is not a good mother! On the next read, look at how little mothers appear - and think/link this back to Brontë's life and her motherly influences.
Hope this gives you an extra point to look at and write on! x