#AskTheExpert Hello madam, My cervix length was 2.7 cm during 18 weeks.So i underwent cervical encirclage immediately.post cerclage length was 3.4 cm.my doctor told me not to use progesterone sustain tablets and maintane injection.When i had scan at 24 weeks ,my cervix length reduced to 3 cm.why it had happened so?should i continue using tablets and injection.I am very much worried about this.pls suggest me