Your babies were born 10 weeks prematurely.They are now 30 weeks old but only 20 weeks in terms of their maturity. The average weight for a baby boy of 20 weeks is 7.3kg.It does look as if your baby boys are lagging behind in terms of their expected weight,but they sleep very well and appear to be content and not hungry. For this reason it does not appear to be a good idea to wake them uo one more time at night.In any case they will be sleepy and won't take much formula Rather introduce more solids into their diets.Your boys will eventually catch up with their weight gain.
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