Is weightbearing (standing, sitting) unsafe for young babies?

[meg2]

I must clarify my original question. I am referring to our perfectly normally developing baby. We are not trying to encourage her to sit, stand or do anything else early. She simply loves being in an upright position- either sitting (on our stomach or on the couch- supported by backrest) or standing (either holding our hands, standing on the ground and holding the couch for balance or simply with us holding her around her chest). She will go from a grizzly baby to a happy/laughing on when in these positions. She is not in these positions for long periods- a few minutes at a time. I am simply concerned as I have heard a few suggestions that babies being upright before the normal curves have developed in their spine can cause long term spinal problems. One of my main concerns is the idea that sitting in a front baby carrier is not recommended for the same reasons, as that is a position that she would spend many hours.
Sorry about the confusion,
Megan

[wutti]

hi meg2,
i think there is no problem with sitting for a few minutes, if the baby is happy with that. have a look at the babies back. if it is extremly flexed, the baby has not the core stability to sit in an upright position. in this case the baby shouldnt sit to long.babies often like the sitting pos. because they have a better persperctive in viewing and looking at things. my son (9 month) is not able to get in the sitting pos. on his own yet, but if we help him with that, he sits very good, with an erected spine. Thats most important. the same counts for standing etc. the baby must be able to keep all erected pos. on its own.
keep smiling...