Girls, I'm really curious when to start potty training ? My mother-in-…

Girls, I'm really curious when to start potty training ? My mother-in-law says you shouldn't keep your daughter in diapers and should hold her over the potty every time she eats because she will go during feeding, everything will be released into the basin and you can then change the diaper. But I know that babies pee every half hour or so. I don't know what to do when starting.