Who is "they"? The law says heartbeat, and a doctor is making the call. Are we NOT trusting medical science to know the difference, or accusing the medical field of politicizing medicine? Inquiring minds want to know.Before the heart develops, and takes any form resembling anything like what we think of as a heart, a few cells start to slightly fluctuate. These cells are the beginnings of what become one of 2 natural pacemakers. the fluctuation can only be detected by ultrasound. There is no heart muscle, valves, or anything to produce a heartbeat that can be detected with a stethescope. That slight fluctuation of those few cells is what they are calling a heartbeat.
I find it interesting that people on one hand are complaining about "6 weeks" while OTOH are presenting evidence that 6 weeks doesn't apply here. Which is it?