I'm with Kathy on this one, 12 weeks is not always enough time, it's too early to have a blanket 'no'.
No baby born under 24 weeks has to my knowledge ever survived, and a lot of the babies that do survive suffer brain hemorrhages and worse, yes you get the odd miracle but they are few and far between.
Also I don't think that forcing women to carry unwanted children is a good thing. There are thousands of children in need of parents already in the foster care system in this country, why forcibly add more?