<prompt> Antiprogesterone compound RU-486 is effective for inducing aboion if the duration of pregnancy is:63 days72 days88 days120 days  <response>: Mifepristone RU 486 an Antiprogestin, degenerates the pregnancy in doses ranging from 200-600mg. This is followed by Misoprostol prostagladin in 400ug orally or 800ug vaginally which causes uterine contractions to expel the dead fetus. This regime is -99 successful - If done within 1st 7 weeks -95 successful - If done within 1st 9 weeks 