- Regimen of high dose MSP in MTOP for 10 - 20 weeks gestation: oral administration of 200 mg MFP, followed by vaginal insertion of 800 mcg MSP after 24 hours (Group I) or 48 hours (Group II), and then by sublingual 400 mcg MSP, every 3 hours until occurrence of miscarriage or maximally 5 doses. + Effectiveness of regimen: the success rate was 100% in both groups, and there was a low proportion of uterine aspiration: 2.61% in the Group I and 1.74% in the group II, respectively.