I have a baby who will soon be 10 months - he is bum shuffling but not crawling. I know not crawling at this age is not concerning but I have noticed he really won’t put any weight on his arms, he does use them to steady himself slightly but as soon as he is in a position that requires putting weight on them he falls down and cries. He seems desperate to crawl and pulls himself forward into a semi crawling position but as soon as his weight shifts from his bum to his arms he collapses. I’ve done lots of tummy time with him but he uses his back and core to keep his head up, you could lift his arms up and he would stay in the same position. I’ve tried putting him in a position where he needs to put some supported weight on his arms/hands and he screams crying so I stop (it’s more than a moan, a proper tears cry). He is weight bearing on his legs but also can’t pull himself up or lower himself down as he doesn’t have the strength in his arms. He is developing his fine motor skills like bashing small toys together and has a good pincer pinch and pokes at things - but also does not clap, wave, or point (but again I know this isn’t a concern until they are around 1). Should I be concerned about his arm strength? I can’t see how he is going to gain strength in them when he won’t bare any weight on them at all.