Not during an IVF Natural cycle ! Sorry, should of been more clear. I have already had a stimulated cycle, and had 7 embies on ice....4 left to go.......so I have a natural thaw cycle now each month, and since I know exactly when I ovulate (because of constant blood tests) thought we may as well have a go a it ourselves - and if 'we' miss, then there is a transfer of an embie 2 days later for another chance....