SPECIAL OFFER: - Limited Time Only!
(The ad below will not display on your printed page)

Say YES to your FREE SUBSCRIPTION today! Simply fill in the form below and click "Subscribe". You'll receive American Baby® magazine ABSOLUTELY FREE! (U.S. requests only)


First Name:

Last Name:





Mother's Birth State: 
Is this your first child?
Due date or child's birthdate:
Your first FREE issue of American Baby® Magazine packed with great tips and expert advice will arrive within 4 to 6 weeks. In the meantime, your e-mail address is required to access your account and member benefits online, but rest assured that we will not share your e-mail address with anyone. Free subscription is subject to publisher's qualifications. Publisher bases number of issues served on birth and due dates provided. Click here to view our privacy policy.

Baby Physical Growth: Slow Weight Gain


I have 6-month-old twins who weigh 10 pounds, 1 ounce and 10 pounds, 14 ounces. Their doctor is getting a bit concerned that they are not gaining weight. He also said the PKU tests show no thyroid problem and he doesn't see any evidence of malabsorption problems. But he's getting concerned. Can you think of any reason the girls are not gaining weight faster?


When kids are not growing as fast as expected, there are several reasons their growth may be slow. They may not be getting enough calories in or they may not be absorbing all of the calories they take in, or they may be burning more calories than most (for a long list of possible reasons, including the thyroid reason you mentioned in your question). Or, they may be losing calories somewhere (such as protein in the urine). Often the best place to start in figuring this all out is to record exactly how much they eat for several days and calculate how many calories they are getting in, compared to what we would predict that they need. Stool tests can detect whether they are failing to absorb what they eat, and a simple blood and urine test can also give a lot of information.

About whether they are losing calories or burning too many: The body uses a number of enzymes to break down food so it can be absorbed in the intestines. People who are missing one or more of the enzymes can't absorb certain foods. The most common example of this is people who are missing or low on the enzyme lactase (it is not all or none). They absorb less lactose or even no lactose. They are then "lactose intolerant" but can miss that important source of calories.

Lactose is a sugar. Some kids also have trouble absorbing fats or proteins. Some kids don't absorb because the walls of the intestines get flattened due to an intolerance to a protein called gluten. Gluten is found in rice and barley (and is more of a problem in wheat -- but that's later). Gluten intolerance is called celiac disease and is pretty uncommon.


The information on this Web site is designed for educational purposes only. It is not intended to be a substitute for informed medical advice or care. You should not use this information to diagnose or treat any health problems or illnesses without consulting your pediatrician or family doctor. Please consult a doctor with any questions or concerns you might have regarding your or your child's condition.