Embryonic growth is often impaired in miscarriages. It is postulated that derangements in embryonic growth result in abnormalities of the embryonic curvature. This study aims to create first trimester reference charts of the human embryonic curvature and investigate differences between ongoing pregnancies and miscarriages. Weekly ultrasonographic scans from ongoing pregnancies and miscarriages were used from the Rotterdam periconceptional cohort and a cohort of recurrent miscarriages. In 202 ongoing pregnancies and 33 miscarriages, first trimester crown rump length and total arch length were measured to assess the embryonic curvature. The results show that the total arch length increases and shows more variation with advanced gestation. The crown rump length/total arch length ratio shows a strong increase from 8+0 to 10+0 weeks and flattening thereafter. No significant difference was observed between the curvature of embryos of ongoing pregnancies and miscarriages. The majority of miscarried embryos could not be measured. Therefore, this technique is too limited to recommend the measurement of the embryonic curvature in clinical practice.

Additional Metadata
Keywords 3D ultrasound, Early pregnancy, Embryonic curvature, Prenatal diagnosis
Persistent URL dx.doi.org/10.1016/j.rbmo.2018.01.017, hdl.handle.net/1765/104947
Journal Reproductive BioMedicine Online: an international journal devoted to biomedical research on human conception and the welfare of the human embryo
Citation
Bogers, H, van Uitert, E.M, van Ginkel, S, van der Mooren, E.D.H. (Elisabeth D.H.), Groenenberg, I.A.L, Eilers, P.H.C, … Steegers-Theunissen, R.P.M. (2018). Human embryonic curvature studied with 3D ultrasound in ongoing pregnancies and miscarriages. Reproductive BioMedicine Online: an international journal devoted to biomedical research on human conception and the welfare of the human embryo. doi:10.1016/j.rbmo.2018.01.017