Cervical Cerclage

Hello mommies. Meron po ba ditong may experience ng premature labor due to incompetent cervix? . I have concerns lng po regarding my pregnancy. I have 2 miscarriages na po in the past and this year we found out that its due to incompetent cervix. I lost my first at 24 weeks. My 2nd at 20 weeks. My obgyne advised na mga more or less 20 weeks daw po xa mgccerclage. Hindi pa po ba too late un considering my previous miscarriages? thank you po.