First pregnancy, one night, I was 16 but lost the baby at around 17 weeks.
Second time I wasn't trying as I'd since been told I was infertile, but I conceived after about 6 months of unprotected sex with them DP. I don't think I had a period in that entire time. I was 24.
Third time I was trying and it took 4 months which was about 2 or 3 cycles for me. I was 27.