The impact of conisation on pregnancy outcome

Aim: The objective of present study was to investigate whether conisation is associated with adverse pregnancy outcomes in Flanders, Belgium. Therefore a retrospective cohort study was conducted at the Antwerp University Hospital. Materials and Methods: The study was approved by the Ethical Committee and based on a questionnaire as well as on medical records. Confounders, like smoking, alcohol use, drug use, chronic illness, and gynaecological disorders during pregnancy were all taken into account. A multiple logistic regression was performed for an association between adverse pregnancy outcomes and confounders. Results: The study showed that there was association between conisation, low birth weight, and caesarean section. After conisation there was a significantly higher risk of 3.275 on a low birth weight. The risk of a caesarean section after conisation was tripled. A gynaecological disorder during the pregnancy had a significantly higher risk of delivering a child with a low birth weight and a higher risk of a caesarean section. Smoking and a chronic illness gave a significant higher risk of caesarean section. Discussion: Conisation is easy to perform and highly effective in the prevention of cervical cancer. Conisation has a high morbidity, as it is associated with severe adverse pregnancy outcome. A conisation should therefore only be performed on a true indication; otherwise it will be the victim of its own success.