when should a baby be able to sit up
Five months to six months. Your baby will be able to sit well with support, holding her head up and her back straight (Sheridan 2008) . Your baby may be able to sit for a moment without your help.Just make sure you stay nearby to provide support, or surround her with pillows to cushion a possible fall.he muscles she needs to use develop gradually from birth, and she finally becomes strong enough to sit between four months and seven months. By the time your baby is eight months old, she should be able to sit well without support (NHS 2013, Sheridan 2008) .