It's fine. For some women if all the reports are normal it's fine to start at week 16 as well.

It all differs from case you case n hence doctor is the best person to advise.. Doctor had asked me to completely stop drinking milk for first 3.5 months due to digestion problem..But that did not cause any issue; as common understanding that everyone has is to have a lot of milk atleast 1 glass daily.

yes Dr is right. my Dr also started in 5th month in my case