a home doppler is not going to show anything until at least 10 or 12 weeks - and even then it's a bit touch and go as to whether you'll find the baby using one. i had lost five angels before carrying my DD to term - i actually felt her move before i could find her reliably with the doppler. i DID use it to keep an eye on her when she was very still and it gave me some peace of mind - particularly during the bushfires early last year when i was struggling with my own BP (had to be evacuated) and the stress was preventing me from being still enough to feel her. it can offer you peace of mind - but later in pregnancy - early in pregnancy the bubba's heartbeat just isn't strong enough to be picked up - you'd be more likely to pick up the pulse through your placenta which is slower and can then add more concern about the health of the baby.