Oh I get you now, I suppose it could be a bit annoying as we are all novices and they are the experts. I kept it to myself as I knew my midwife would just tell me it's difficult to find but I must say I was getting a bit worried by week 18, I said to my oh I didn't want to listen again as it just got me worried, we tried one more time and lo and behold he found it almost immediately and boy was it loud! We find it straight away every time now!