My Aunty and Uncle were on IVF for 3 years and eventually gave up trying as it was just so stressful in the end. A few months later they were pregnant. Once bub was born they didn't worry about contraception for the same reason as you and they were pregnant 9 months later. Again, didn't worry about contraception after bub 2 was born and a few months later bub 3 was on its way!! My Uncle then had the snip. So they had 3 girls in 3 years naturally after being on IVF for 3 years with no success!!

My advice would be to go on contraception til Juliette is at least 10 months old