Hi Suresh
Thanks for writing in. I would like to start with apologizing for a delayed reply.
About Your Queries
Weight
As per the WHO standards – Your baby’s weight is perfectly fine. Here are the weight and height statistics for a male baby.
4 Month
Height – 60.0 – 67.8 CM
Weight – 5.6 – 8.6 K.G
5 Month
Height – 61.9 – 69.9 CM
Weight – 6.1 – 9.2 K.G
6 Month
Height – 63.6 – 71.6 CM
Weight – 6.4 – 9.7 K.G
7 Month
Height – 65.1 – 73.2 CM
Weight – 6.7 – 10.2 K.G
8 Month
Height – 66.5 – 74.7 CM
Weight – 7.0 – 10.5 K.G
9 Month
Height – 67.7 – 76.2 CM
Weight – 7.2 – 10.9 K.G
10 Month
Height – 69.0 – 77.6 CM
Weight – 7.5 – 11.2 K.G
11 Month
Height – 70.2 – 78.9 CM
Weight – 7.4 – 11.5 K.G
12 Month
Height -71.3 – 80.2 CM
Weight – 7.8 – 11.8 K.G
About neck, moving left and right, but not still
Although, your baby can hold it up when placed in a sitting position at around 4 months. However, his neck muscles and head control should be strong and steady by 6 months. In the sixth month, you can expect your baby to sit upright without support or with a minimum support.
Health & development of 6 months old baby
Do you know, ability to hold his neck is also a sign that he is ready for food diversification (time to introduce semi-solid and solid food).
Signs that your baby is ready for solid food
So, no need to panic. However, if you still have doubts, it is always good to consult a pediatrician (https://momcuddle.com/find-a-pediatrician).
Warmest Regards
Mom Cuddle
