Habitual Abortion Treated with 17 Alpha-Hydroxyprogesterone Caproate

17-alpha-hydroxyprogesterone caproate cervical cerclage preterm birth, adjuvant 17OHP-C prophylactic cerclage recurrent pregnancy loss, cervical insufficiency progesterone cerclage combination therapy, second trimester pregnancy loss cerclage outcomes, 17P cerclage synergistic effect preterm delivery prevention, retrospective cohort cerclage progesterone caproate effectiveness, recurrent midtrimester loss cervical incompetence treatment, Samson cerclage 17OHP-C adjuvant study, history-indicated cerclage progestogen adjuvant therapy outcomes, cervical insufficiency multiple pregnancy losses cerclage alone vs progesterone