For example, breastfed infants may be more easily aroused from sleep than formula - fed infants at 2 - 3 months of age, which is within the 2 - 4 months peak age of SIDS cases. (webmd.com)
Above that was Sampson's unique appreciation for what this generation of pioneers — now at peak age — might yet accomplish on their own terms. (si.com)
(6) At that point, the animals» cataracts had already reached peak age - related severity, and remained stable after 5 months of further aging irrespective of treatment. (sens.org)