Luteinizing hormone profiles during ovarian stimulation in assisted reproductive treatment.

Introduction: Few data is available on the natural course of luteinizing hormone (LH) during ovarian stimulation, but it has been suggested that 'oversuppressed' LH could decrease fertility outcomes. Our aim with this study is to evaluate the changes in LH depending on the used stimulation protocol to better define LH oversuppressioin.

Methods: Patients undergoing oocyte retrieval in a tertiary fertility center between 01-01-2015 and 30-09-2020 after stimulation with a short-agonist (SA) or antagonist (A) protocol were included.

Pregnancy outcome after cervical conisation: A 2nd retrospective cohort study in the Leuven University Hospital.

Objective: To evaluate whether the dimensions of the cones removed during large loop excision of the transformation zone have decreased over time. Secondly, whether these changes were associated with a lower risk of obstetrical harms on a subsequent pregnancy.

Study Design: A retrospective matched cohort study was performed in a tertiary referral unit in Belgium.