hi want2bamom. It all depends really. Some people have PCOS and ttc doesn't take long. For others like me it messes with the cycle and means it takes longer. I have long irregular cycles (cd101 today) so am being reffered to the hospital for clomid to release some eggys.
For others though like I said if they have normal cycles you can get pregnant straight away. It all depends on symptoms and how ur body is handling it
Good luck!