These types of lesions in themselves do not prevent pregnancy, but if the alteration detected is of high grade (H-SIL), it is recommended that the lesion be removed (usually with a simple surgery called conization) before the woman becomes pregnant.
In other cases, with controlled low-grade lesions (L-SIL), pregnancy will not be contraindicated. Dysplasia has not been shown to have a negative effect on fetal development.
What is important to keep in mind is that women who have previously undergone conization will have an increased risk of cervical incompetence, which can lead to premature delivery. As a preventive measure, serial cervical length measurements should be taken during gestation.
In cases where the length is very short or becomes shorter during pregnancy, preventive treatments such as cervical cerclage or pessaries are indicated to try to avoid preterm labor as much as possible.