Marc Thiessen looks at the reasons U.S. opinion has moved from 56% pro-choice to 42% pro-choice in the last 14 years. He then notes that a bill in Nebraska banning abortions after 20 weeks is likely to end up in the Supreme Court. The debate will be whether scientific evidence that unborn babies can feel pain at 20 weeks and beyond should amend the decision in Roe v. Wade that states can only limit abortions after "viability" (24 weeks).
Thiessen's discussion includes a link to Michael Clancy's 1999 photo of an in-utero surgery to repair spinal bifida. I'd never seen this; it's worth seeing.