A few years back I read this novel which just had few chapters ..the novel starts with the death of the mc and how he is Reborn into a fetus and starts cultivating in the fetus form only and as he kept cultivating his baby form became big and during the birth ..the mother can't deliver and would die ..so he would use a bone shrinking secret art to reduce his size for a safe delivery and then later when he is few years old he thinks back to the time when he was a top expert in his past life an elder of an top most sect .. This is pretty much all I remember from a few years ago. If anyone knows what this is called, please comment. Thank you.