Hi, this is my only problem I've had during pregnancy. I miss my sunbeds! But no you are NOT allowed or should I say it's not advisable to go under a sunbed. Your baby is much more important than a tan, can't believe I said that I should practice what I preech!
What I can recommend, is a fake tan called Fake Bake, beats St Tropez hands down, as it's a lovely golden colour, but at the same time looks natural. You can get it from Harvey Nichols for £35 or online at Salon Lines for £20. Trust me I am tanorexic and found looking white and ill a major disadvantage to pregnancy, but hey, it will do your skin the world of good to remain pale! x