I purchased a ear one when I was pregnant. But when DD was in Special Care nursery we did her temp with just an under arm one. Aparently the Ear ones are not suitable for infants (that's what the mw told us). I had originally wanted the forehead one but someone told me that they weren't acurate. We did a test with one compared to underarm in the nursery and they were the same. So I would recommend the forehead one if you want to spend the $$ otherwise a simple underarm electric one for less than $10. We've purchased one for DD until her ears are bigger.