Article 1 adult 1 case control study 1 cerclage 1 cervical dysplasia 1 cervical excision 1 cervical length 1 clinical outcome 1 cohort analysis 1 cone biopsy 1 controlled study 1 demographics 1 excision 1 female 1 follow up 1 human 1 infertility therapy 1 loop electrosurgical excision 1 loop electrosurgical excision procedure major clinical study 1 maternal age 1 pregnancy outcome 1 premature labor 1 preterm birth 1 retrospective study 1 risk assessment 1 risk factor 1 second trimester pregnancy 1 sensitivity analysis 1 smoking 1