Good call, profx. There is no actual tickling in the scene; she says the words "oh no, it tickles" in response to Matthew Perry's inquiry as to whether the ultrasound will hurt. This is before she is receiving the ultrasound (the scene goes by awful quick when you are watching it on tv, I'm sure, and you aren't prepared for it). I'm attaching what is a 10 minute clip to this post; I was unable to cut the scene out. It occurs a little bit before the 9 minute mark.