RETRACTED: Clinical implications of first-trimester ultrasound dating in singleton pregnancies obtained through in vitro fertilization.

ABSTRACT:

Background

In pregnancies obtained by in-vitro fertilization (IVF) the exact day of conception is known. For that reason, IVF pregnancies are currently dated according to the day of oocytes retrieval and consequent embryo transfer. The aim of the present study is to determine whether the knowledge of the exact day of conception in IVF pregnancies is a sufficient argument against dating these pregnancies by first trimester ultrasound measurement of the crown-rump length (CRL), as it is recommended in natural conceptions.

Methods

A retrospective study was performed, including all women with singleton pregnancies conceived by IVF who underwent the first-trimester ultrasound scan for the screening of aneuploidies between January 2014 and June 2019. For each pregnancy GA was dete

SUBMITTER: Rapisarda AMC 

PROVIDER: S-EPMC9401168 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature