If a continuing pregnancy occurs, what are the chances that the fetus will be malformed?

There is an association between birth defects and exposure to misoprostol. (birth defects such as defects in the skull and abnormalities in the limbs (called Mobius
Syndrome). However the relative risk to have a baby with malformations after using Misoprostol is low. (less than 1 malformation on 1000 births exposed to misoprostol).
To compare: the normal risk of having a child with Down syndrome is 1 on 1,300 for a 25-year-old woman; at age 35, the risk increases to 1 on 365. This is a much higher risk than the risk of malformations as a result of the use of Misoprostol. Women who fear malformations of their embryo have to be advised to see their doctor. The malformations do show on a sonogram.