The main argument against them bein

The main argument against them being crease lines is that the lines on the palm are all present by the time the foetus is 3 months old. The lifeline forms at 7-8 weeks gestation,heart & head lines at 9-10 weeks,but the muscles needed for movement of the hand don't form until 11 weeks,when there are the first reflex movements. Voluntary hand actions don't start till 23 weeks. The nerve endings,which stimulate the muscles,are forming around the same time as the lines. So the lines are there before even reflex movements are possible and long before voluntary muscular movement of the hand exists.