My 1 month that old baby like to sleep on my chest.. he don't really sleep on his back.. only sides or tummy. For now on my chest I am still okay, I worry that when he grow up older and become heavier how will I able to let him sleep on my chest.. but sleeping on my chest he can sleep very soundly.

Everything that we choose to do or not do now will hp shape his sleeping habit and that is a sleeping habi that u don't want to be shaped. All babies like to sleep ion the mother's chest because of the warmth, security and the familiar heartbeat but u cannot be baby sleep sleep for 1-2 hrs u let him sleep on u and u don't do a thing? U would sill need to go toilet, eat ur food etcetc. If u cultivate such habit, baby will want to sleep on u every time he wakes up in the middle of the night and if for some reason u are not there at bedtime, baby will wait for u. When he fall asleep, transfer him to the bed/cot. Gradually u should progress to when he is semi asleep in ur arms, he will go into the cot, then hopefully transition to the can sleep by himself with u beside. By 9 months, baby can be 9 kg...not a feasible long term plan for sleeping on the chest i would say. Can sleep slightly to the sides when u put him down