Hello all you conception experts! I have a quick question, don't know if you can help. I've read somewhere that the luteal phase is never longer than 16 days. Is that right? Or wrong? I'm just basically trying to work out when I might have ovulated this month. AF is late (not preg very unfortunately) and I'm thinking that if I count back 16 days from today, then I definitely missed my fertile window. But does ovulation move with your AF, if you see what I mean? ie if you have a late AF does that mean that you ovulated 'late' as well? Does this make any sense at all? Thanks in advance to anyone who can help!