Seems that I have started to grow more white hair after birth. Is this normal ??

Yes, it's the same for me. After having my #4, i feel that grey/white hair growth is more than the rest. Super itchy at the area where all these hairs are. Irritating to the max. Think due to our hormone changes, many things will change too although we do not want it. This is inevitable. What i did was to drink Reserve by Jeunesse to help from inside out. It works on our stem cells. Interested? Refer to this link. https://vanessateoky.jeunesseglobal.com/