my baby 1 month and 9 day old her weight birth time 2.5 kg and after birth jondies weight 2.3 kg at 8 days old and now weight is 3 kg her weight gain ok or not

A. hello babies birth weight will reduce first and then baby starts gaining so it is absolutely nothing to worry and if baby is gaining a minimum of 150 g to 200 g per week then it si absolutely nothing to worry about and not a problem.. if bm is not sufficient then give baby infant formula milk stage 1 using a bpa free bottle like Babyhug