my baby was born in 30 weeks and her birth weight was 1.5kg. earlier she gained approx 700-800gm per month till 6month,she was exclusively on breast feeding, after that we started solid food as prescribed by our paediatrician, then she gained only 100gm in one month...is it normal?

Question

Accepted Answer

the average birth weight of neonates is about 3 kg. 
during the first few days after birth, the newborn loses
extracellular fluid equivalent to about 10% of the body
weight. 
most infants regain their birth weight by the age of 10 days. subsequently, they gain weight at a rate of
approximately 25 to 30 g per day for the first 3 months of life. 
thereafter they gain about 400 g weight every month,
for the remaining part of the first year. 
an infant usually doubles his birth weightd (taken as 3 kg) by the age of 5 months. the birth weight triples at 1 year and is four times at 2 years of age. 
the weight of a child at the age of three years is usually
five times that of dthe birth weight.