In medicine and statistics, gold standard test usually refers to a diagnostic test or benchmark that is the best available under reasonable conditions.[1] Other times, gold standard is used to refer to the most accurate test possible without restrictions.
My daughter was still in NB nappies at that age and she is almost 6 months now and still in her 0-3 months clothes and wee tiny shoes :-) She is in size 2 nappies now.Some babies are just dinky!llen is 13 weeks and is wearing size 3 nappies and 6-9 month clothes.
1 After that, babies should have at least 6 to 8 wet diapers a day.  How many bowel movements your baby has each day, and their volume and consistency. Newborns may have just one poopy diaper a day at first. Poop is dark and tarry the first few days, then becomes soft or loose and greenish-yellow by about 3 to 4 days.