The progesterone derivative dydrogesterone abrogates murine stress-triggered abortion by inducing a Th2 biased local immune response. - Joachim,R.; Zenclussen,A.C.; Polgar,B.; Douglas,A.J.; Fest,S.; Knackstedt,M.; Klapp,B.F.; Arck,P.C. (Steroids, 2003)