... My little testimony received quickly complete the gel is just very small but good any cream or fogger works ... I wanted to test to 10sa + 2, I thought it was too early but after few minutes looking I could hear the soft baby sound! (you really listen below, put a line of gel just above the pubic bone, just above the bone from left to right). It is easy to differentiate the baby's heart of our, ours is almost 1 second pulse sonorous and "heavy" since our heart beats around 80, below I hear especially from the sides, Baby heart was twice, 150 beats min very distinct, the sound was less strong but we still of course :) Anyway great for reassurance when you have the echo almost 14 weeks for lack of space and want to announce to the family for Christmas ... I'll just say "let's go molo not knowing if it bothers baby", the aim being simply de-stress! And do not worry if it takes a little more time ... I recommend !!!