It claims that distressed babies who are repeatedly left to cry are at risk of developing problems in later life. Leach argues that recent brain research proves that babies who are left to cry for prolonged periods are at risk of suffering damage to their developing brains, which reduces their capacity to learn. Comments Share your thoughts and debate the big issues. The most insightful comments on all subjects will be published daily in dedicated articles. Anastasia Baker, director of Night Nannies, which helps solve babies' sleep problems, said: "I don't think there is any harm in leaving a baby to cry for a few minutes. Want an ad-free experience? Vote Are you sure you want to submit this vote? You must be logged in to vote. It allows our most engaged readers to debate the big issues, share their own experiences, discuss real-world solutions, and more.