B.M.
My advise is keep it simple. With a big crowd of woman you are going to get lots of people just wanting to talk and visit rather than play games. I would say just do 2 or 3. With the food, visiting and gifts, 2 or 3 games will be plenty. Some that I have played that are easy and fun are.......
Put candy in a baby bottle. Have everyone try and guess the correct number of candy.
Give everyone paper and pen. List animals and tell them to write down what the baby of that animal is called. For example: Baby cow is a cafe. A baby whale is a cafe. A baby swan is a cygnet. A baby deer is a fawn etc. Person with the most right wins.
Give everyone pen and paper. Have the Mom-to-be walk around with a tray of baby items. Tell everyone to take a good look at the tray. Then have the Mom-to-be walk out of the room and stay out of sight. Then start asking everyone questions about the Mom-to-be instead of what was on the tray. For example: What color are her earrings? Is her hair up or down? What color is her shirt? Did she have a bracelet on? You can even ask some questions about the baby like....When is the due date? What are the names she's thinking of etc. Everyone gets a kick out of this one :)
Also you can play match the celebrity parents to the baby name. I had this one printed out with multiple choice. So for example: Gwyneth Paltrow's Daughter is A) Apple B)Coco C) Maria. Answer: A)Apple. This is one is fun to do. I think I did 10 questions. It's fun to see who is up to date on all their pop culture.