[JURIST] Oklahoma Governor Mary Fallin [official profile] on Tuesday signed into law [press release] House Bill 1888 [materials], prohibiting abortions [JURIST news archive] after 20 weeks. The law allows abortions past the 20-week mark only in certain extenuating circumstances where the mother faces death or serious injury. The legislation is based on evidence suggesting that a fetus can feel pain after 20 weeks [Reuters report] and would require doctors to measure the age of a fetus before performing an abortion….