We routinely use the carbon dioxide laser miniconisation procedure for
cervical interepithelial neoplasia I-III. A retrospective case contro
l study was conducted in 1,485 miniconised women during 250 subsequent
pregnancies (including three twin pregnancies). The analysis showed t
hat the miniconised subjects had no significant pregnancy complication
s and the same preterm birth ratio (8.0%) as controls matched for age
and parity.