When a baby is getting milk (he is not getting milk just because he has the breast in his mouth and is making sucking movements), you will see a pause at the point of his chin after he opens to the maximum and before he closes his mouth, so that one suck is (open mouth wide - pause - close mouth type of suck).
If you wish to demonstrate this to yourself, put your index or other finger in your mouth and suck as if you were sucking on a straw. As you draw in, your chin drops and stays down as long as you are drawing in. When you stop drawing in, your chin comes back up.
This pause that is visible at the baby's chin represents a mouthful of milk when the baby does it at the breast. The longer the pause, the more the baby got. Once you know about the pause you can cut through so much of the nonsense breastfeeding mothers are being told, such as: Feed the baby twenty minutes on each side. A baby who does this type of sucking (with the pause) for twenty minutes straight might not even take the second side. A baby who nibbles (doesn't drink) for 20 hours will come off the breast hungry. See the video clips at the website nbci.ca which show when a baby is getting milk (or not) and also how to latch a baby on and how to use compression.
Questions? Get Dr. Jack Newman's book The Ultimate Breastfeeding Book of Answers.
Jack Newman graduated from the University of Toronto medical school as a pediatrician in 1970. He started the first hospital-based breastfeeding clinic in Canada in 1984 at Toronto's Hospital for Sick Children. He has been a consultant with UNICEF for the Baby Friendly Hospital Initiative in Africa, and has published articles on the subject of breastfeeding in Scientific American and several medical journals. Dr. Newman has practiced as a physician in Canada, New Zealand, and South Africa.
Slow Weight Gain After Early Good Weight Gain, 2009©
Written & revised (under other names) by Jack Newman, MD, FRCPC, 1995-2005©
Revised by Jack Newman MD, FRCPC, IBCLC & Edith Kernerman IBCLC, 2008, 2009©