Do you know whether radio waves from a mobile phone base station could be harming our unborn baby?

There is no evidence that radio waves from mobile phone masts cause harm to humans or the unborn baby. Radio waves are not, in fact, ''radiation'' but nevertheless can have effects on cells in very high intensity in laboratory conditions. As their intensity from radio phone masts reduces dramatically as your distance from the mast increase, it is very unlikely that they have any adverse effect.