Games - Put pegs on a line. How many can you take off and hold with only one hand.
Cut out pics of preg celebs, cover the faces. Guess who is who.
A friend did this for me: buy a few baby items from the supermarket (powders, clothes etc) and people have to guess the price of each. Closest wins (and I got to keep all the baby items!)
Freeze some jelly babies in ice cubes for your drinks - whoever's baby is 'born' first wins!!

Food - Not just cupcakes, mini cupcakes!! Mine were iced in blue, but you could do pink! These were a huuuuuge hit!
Fruit kebabs, but on toothpicks (eg A grape, a piece of strawberry and a square of watermelon is about all that will fit!)
Mini quiches (use a slice of flattened bread for the base)


Have an awesome time!