Saying "Mama"

Good evening mommies, may same kaya with my toddler who is 1 year and 11 months . Marami n sya nasasabi n words he even knows all the alphabet. But nag worry ako. Until now he doesn't call me mama, but he knows how to say papa. Sometimes when we ask him who I am, his response is his name. #advicepls #pleasehelp #ask