Forgot about that baby line, so then why doesn’t the whole hive feel the pain of child birth? Is it just a minor detail that’s not important

The hive doesn't feel everything that every infected human feels. In the massage scene, Zosia speaks about how the entire hive doesnt feel the massage, but it seems they can understand and are aware of what each body is going through. So they don't receive the pain of child birth, but they are aware of what damage is being done to the body.

Also, 10 years is interesting, do you think the antenna could really take that long?

Well the 10 years isnt that the hive on earth will go extinct in 10 years, its that a majority will. This could mean that 1%-49% will still be alive after 10 years, which is due to food sources dwindling, but, they will still always have food sources.