Babies as young as 2 months old can be taught to sleep through the night by being left to cry, says a large and prominent pediatrics practice in New York and Los Angeles.

Tribeca Pediatrics is among the most ardent proponents of the sleep-training practice, also known as extinction, in which parents don’t intervene when a baby cries after bedtime. Some sleep experts say the method has gained broader acceptance among parents. However, Tribeca is unusual in recommending sleep training at such a young age.

...