My son was born on the 75th percentile and had been tracking this until at least 8 weeks old. He wasn't weighed again until his 16 week jabs and then he had dropped a percentile and was tracking on the 50th. The following week I got him weighed again and he had dropped further meaning he sat somewhere between the 9th-25th percentile. This was quite unexpected as nothing had seemed to change feeding wise and we'd even started discussing moving up to 6-9 month clothing as he was outgrowing his sleepsuits/ trousers (height is on 91st percentile).
He's been weighed weekly since and although he put on 300g the first week his weight gain subsequent has only been 170g 2nd week and 90g 3rd week - although he is at least steadily tracking on the 20th percentile. Up until now I'd been told I needed to start supplementing his breastfeeding with formula if he didn't start to put on more weight, but the most recent health visitor we've seen has told us not to do that but to keep breastfeeding as we're doing and if he's still tracking 25th by next week (22 weeks old) then to consider starting weaning at 24 weeks - but still not to worry about supplementing feeds as this might just be him finding his own natural rhythm. He's been seen by the GP and no physical health concerns.
I don't necessarily want to supplement feeds and thought breastfeeding was going fine up until these issues, but I also want to make sure I do everything I can to help him regain his weight.
He's been exclusively breastfed since birth but has never been a baby that will just feed whenever (unlike my 1st!) and very much has to be ready for it. For example I may try to feed him and he will turn away and sometimes get upset, only to have a full feed 5 minutes later.
As I'm writing this I'm not sure what the point is, other then to maybe get a bit of reassurance from other parents whose babies have had this weight loss? Has anyone else had similar? What worked for your baby? Were there any other health issues that needed to be explored?