With your first anywhere from 18-23 weeks. I'm on number two and have felt flutters and inner movement since 13 weeks. And they're only getting stronger. I can't wait until my baby daddy can feel it too.
It depends on if it's your first pregnancy or not. You might not feel baby move until the middle to end of your fifth month if it's your first pregnancy. It will feel like flutters at first and get stronger as baby gets older. If this is your second or third you might feel baby move as early as 4 months cause your uterus thins with each pregnancy.