Just got my son weighted this morning and hv is worried as he only gained 4oz / 160g in two weeks. he used to gain weight well before (3530g birth weight, was on 50th but now dropped to 25th centile). he is fully breastfed and I feed him on demand, he feeds frequently during the day and about three times at night and is generally a happy smiley baby. he doesnt poo very often- about twice a week (fairly big poos but not hard or obviously painful to him)- mil and sil are trying to convince me that he needs water-I disagree. but slowly I am starting to get insecure thinking I must be doing something wrong. Is it my diet (i think i am eating alright and healthy), is it the position he feeds (lying down at night, bed-sharing), the duration of his feeds (ten minutes max), the frequency (anything between 1 and 3 hourss)? please help!