Harmful to Use a Fetal Doppler Frequently?

A

Hi ladies. I’m 12+2 today and used a fetal doppler for the first time today. I found my baby’s heartbeat after a few minutes and it was absolutely amazing. I want to use it every day. However I’ve read things on the internet about how frequent usage can be harmful because it can warm up the tissues??? I will not use my doppler every day if this is the case but I was wondering if anyone else has ever heard this too? Thanks in advance.