We have an ivf conception and now in 5th month(18-19weeks in tifa scan) of pregnancy. The cervix length was measured as 3.3cm and our gynaecologist says to have a cervical cerclage but we have seen reports of my other friends and browsed net where it mentions that it is absolutely necessary only if its below 2.5cm now we are really afraid of cervical cerclage procedure (due to already multiple procedures done in ivf) and want to know if its absolutely necessary.