In medicine, the BUN-to-creatinine ratio is the ratio of two serum laboratory values, the blood urea nitrogen (BUN) (mg/dL) and serum creatinine (Cr) (mg/dL). Outside the United States, particularly in Canada and Europe, the truncated term urea is used (though it is still the same blood chemical) and the units are different (mmol/L).
Your child must be both physically and emotionally ready for toilet training. Most children are ready to start when they are between 22 and 30 months of age, but every child is different. Toilet training usually becomes a long and frustrating process if you try to start it before your child is ready.
How do I know when my child is ready for potty training? There's no magic age at which children are ready to start learning how to use the potty, but some develop the necessary physical and cognitive skills between 18 and 24 months of age. Many parents don't start potty training until their children are 2 1/2 to 3 years old, when daytime bladder control has become more reliable. And some children aren't interested in potty training until they're closer to 3, or even 4. Use the checklist below to measure your 2-year-old's progress toward readiness, and keep in mind that starting before your child is truly ready doesn't mean you'll finish sooner â it's more likely that the process will just end up taking longer.