My wife test came positive .. Last period was on 18th May, so it's abt 5 weeks now...

actually I realised one thing, it was very early we hv been advised to do the scanning... it was just 5 + weeks, usually it takes abt 8 to 9 weeks to detect hearbeat... so we went to different hospital and getting scanning done again at 8.5 weeks time... the earlier doctor we consulted was just a money minting idiots... hope this answer is helpful to few ppl

My 5 weeks sonography was not having heartbeats, so doctor recommended to do sonography in 8 weeks and then heartbeat was detected. So I think it is normal.