Average time to conceive

Hi everyone,this is my first post.Earlier this year I was pregnant with our little boy,unfortunately after 15 1/2 weeks of carrying him I had to have a therapeutic termination as he had a condition that would prove fatal to him.It has now been 3 months since we said goodbye and we are hoping to  try again to build our own little family.Was just wondering how long people have tried for before becoming pregnant,our little boy was a very lovely surprise and not planned at all so I'm not too familiar with how long Realistically it could take (I understand it's different for everyone) 
Any advice or anecdotes are welcome.x