My baby is 4 months and have not flipped yet, how do I help her flip?

Babies develop skills differently, Once ur baby got head control, she will learn to flip over. U try wiggling a toy next to the side, she customarily rolls to. Or lie down next to her on one side- just out of reach and see if she will roll to get closure to u. Applaud her efforts & smile. If ur baby is not flipping over, even after 6months old then u concern ur doctor. Now nothing to worry.