either of two large organs lying within the chest cavity on either side of the heart; they supply the blood with oxygen inhaled from the outside air and dispose of waste carbon dioxide in the exhaled air, as a part of the process known as respiration.
Most babies first pull themselves up to a standing position between about eight months and 10 months. At this stage your baby will need to hang on to you or a solid piece of furniture. By 11 months she may be able to stand on her own.
Yes | No Thank you! If this is your first child, then I suggest you speak with professionals as her doctor or nurses in his office. Three month old babies rarely are able to sit up due to muscle control. They start holding their heads up by three months but not sitting independently. Try not to rush the process, allow all good things to come in time.....in a few months down the line, she will be sitting up and crawling then ,later ...walking.....and you won't have time to sit or think.