I had a scan at 11 weeks and the heart rate was 175 - sonographer didn't say anything and at the end said everything looked great. But today I accidentally came across something saying it should be lower than that and generally drops after 9 weeks to a max of 160bpm by 12 weeks.
Me being me I've just spent an hour on Google and am now panicking after reading it could be a sign of cardiac abnormality and/ or Downs syndrome. The latter has been linked to a higher fetal heart rate.
Does anyone have any experience or advice?