Many parents are unsure about when to start toilet teaching or "potty training." Not all kids are ready at the same age, so it's important to watch your child for signs of readiness, such as stopping an activity for a few seconds or clutching his or her diaper.
Most children begin to show these signs between 18 and 24 months, although some may be ready earlier or later than that. And boys often start later and take longer to learn to use the potty than girls.
Instead of using age as a readiness indicator, look for other signs that your child may be ready to start heading for the potty, such as the ability to:
follow simple instructions
understand words about the toileting process
control the muscles responsible for elimination
express a need to go verbally
keep a diaper dry for 2 hours or more
get to the potty, sit on it, and then get off the potty
pull down diapers, disposable training pants, or underpants
show an interest in using the potty or wearing underpants
About Timing
There are some stressful or difficult times when you may want to put off starting the toilet-teaching process — when traveling, around the birth of a sibling, changing from the crib to the bed, moving to a new house, or when your child is sick (especially if diarrhea is a factor). It may be better to postpone it until your child's environment is stable and secure.
Also, some experts may recommend starting the process during summer because kids wear less clothing, but it is not a good idea to wait if your child is ready.