There are rare times when our genes just screw up and produce a fetus that won't last even nine months in the womb and be stillborn. You can see very early if a baby has two arms and two legs and fingers and toes growing. Every pregnant woman should see what she is bringing to life by week 20. That will change all hearts.
If ultrasound can show me what my intestines are doing with the pickle I ate, you can see what a baby is doing floating around in your tummy. Just watch the crt monitor.