Hi my baby will complete 16mnths on 18th sep..still she is not intrested in standing nor walking...once a while she is standing or once she walked on own but later again she is preferring only crawl.im worried ..if she is intrested only she will stand but rare..she is premature baby born 1 week before completing my 8th mnth ..born with 1.9kgs ..now her weight is 9.5...can anyone plz suggest me what can I do ..iam really tensed as her brother is also premature born in 9th mnth but he walked by 1year..but she is not walking..I showed to local dctr he says she is having flat foot..it will take time .so anyone plz help me what is this and is it serious what can I do