A women's knitters group is having a meeting, and they are all pregnant. They all talk about their pregnancies.
One woman says, "I'm taking vitamin C so my baby has a healthy immune system."
Another knitter says, "I'm taking folic acid to help my baby's brain."
Finally, one woman says, "I'm taking Thalidomide!"
All the women turn to her and say, "Thalidomide! Don't you know your baby could be born without arms?"
The woman shrugs her shoulders and says, "I don't know how to knit arms."