Pregnant women are a bit like Weebles. They wobble but they don't often fall down. So why is this? Well, it seem that women's spines are built differently from men's - a difference which allows them to lean backwards to counterbalance the weight of their developing babies. Yet despite this miracle of evolution, a degree of clumsiness remains the inevitable consequence of weight gain, coupled with a change in your centre of gravity. So don't be alarmed if you find yourself bumping into doors or knocking into furniture. Armpads and shinpads are always available for the clumsiest amongst you!