Before I’d interviewed Zoe, I’d never asked my mother about when she went into menopause. As someone who is about to enter her 40s, it was something in the not-so-distant future, but nothing to worry about now. Only, for some women, it is. Zoe’s sister Kathryn went into menopause when she was just 32. Devastatingly, by the time she had her diagnosis, it meant she lost the ability to have children. For Zoe, early menopause started the year after her son Kit was born. She was 37.