LONDON — If getting your infant to wake up less frequently overnight and log more hours of shuteye overall, then this research is for you. A new study finds that babies transitioned to solid food earlier sleep longer and woke less frequently overnight. Researchers at King’s College London and St. George’s University of London say that the benefits also extend to the parents, particularly mothers. Maternal wellness was linked to infant sleep problems, which were seen more frequently among those who exclusively breastfed for the first six months of a child’s life. Government guidance in the United Kingdom and recommendations by the American Academy of Pediatrics suggest mothers breastfeed exclusively until nearly six months of age. But in the UK, 75% of mothers introduce solids to their babies before the five-month mark. Researchers say that 26% of parents say their infant waking up in the night influenced their decision.