Poor weight gain in a 2 month old

Question 1 of 9

You are doing your pediatrics rotation at a children’s hospital. You are asked to see a two month old boy (Cody) who has just been admitted for poor weight gain. At two months, he weighs less than his birth weight.

The term ‘failure to thrive’ comes to mind, but you are a little foggy as to what it actually means.

What is the most common definition of failure to thrive?

Crossing two major weight percentiles on the appropriate growth chart

Crossing two major height/length percentiles on the appropriate growth chart

An infant gaining less than 25-30 grams/day

Failure to regain birth weight by 14 days of age

Failure to double birth weight by 6 months of age