After a lot of thought I realised that I am a writer of Women's Fiction.
My definition: subjects that are of greater interest to women than they would be to men! And to clarify (but only a little). It's about relationships, family, women's issues, development and growth of characters after a struggle, includes characters that women can identify with. The story can be from any decade, country, place or time. It can include, murder, mystery, suspense, intrigue, romance, comedy, tragedy.
That's my 'in a nutshell' answer.
What is Women's Fiction?