it's taken him a whole 3 weeks to get back to his birth weight - was 7lb 6oz at birth, 7lb exactly at 11 days and now at bang on three weeks has crawled his way back to 7lb 6oz.
Have to say I'm glad I've got a fantastic HV (they do exist honestly!) who isn't the remotest bit concerned he's taken so long to get the weight back or I'd be panicking - especially given DS1 and 2 had both jumped up the growth charts by the time they were the same age.