Failure to thrive is exactly what it sounds like: your infant, for whatever reason is not gaining enough weight and ‘thriving‘. Perhaps your baby is missing developmental markers as well, such as rolling over, smiling, and/or cooing. Failure to thrive can have so many causes that it may take awhile to diagnose exactly why your infant may not be gaining weight. Failure to Thrive and Weight Gain If you have been blessed with a particularly large baby, eventually your baby will slow down in his rate of growth. My son was in the 95th percentile until about age 2. Slowly … Continue reading →