CASE REPORT: A monozygotic twin pregnancy after application of zona rubbing on a frozen—thawed blastocyst

Martine Nijs, Pierre Vanderzwalmen, G. Segal‐Bertin, L. Geerts, E. Van Roosendaal, Linoy Segal, A Schoysman-Deboeck, R Schoysman

Human Reproduction · 1993 · 18 citations · 0 references

Concepts

Abstract

Assisted hatching techniques enhance the success rate of implantation of in-vitro fertilized human embryos. We report here the successful transfer of a frozen-thawed human blastocyst on which we applied a non-invasive zona rubbing technique (reduction of the thickness of the zona pellucida by gentle rubbing with a microneedle). The implantation in the uterus led to the delivery of healthy monozygotic twins.