Thank you Heather2780 She really was confused because like I mentioned the nurse in the Pediatrician's office told her .4 ml and the actual pediatrician said .8 ml. When my daughter in law told her that the nurse had just told her .4 ml, the Dr said that was not correct. But then later that day, my daughter in law spoke with a friend of hers who works in a pediatrician's office and she adivsed her that .8 ml was way too much for a baby of 10 pounds, 13 ounces, that it should only be .4 ml. So, needless to say, she wasn't sure which way to go. You want to follow your child's physician's advice but when two people who also work in the medical field with infants tell you that you got the wrong instructions, you have to wonder. Thanks so much for your help.