Atypical hatching of a human blastocyst leading to monozygotic twinning: a case report.
OBJECTIVE
To report a case of monozygotic twinning after atypical hatching of a human blastocyst.


METHODS
Case report.


METHODS
University-based IVF program.


METHODS
A 33-year-old woman with tubal sterility.


METHODS
Embryo transfer of a human blastocyst with atypical hatching.


METHODS
Development to the blastocyst stage, hatching process, follow-up of pregnancy.


RESULTS
Development of a monozygotic dichorial pregnancy.


CONCLUSIONS
First report of an atypical hatching of a human blastocyst leading to dichorial monozygotic twinning.
Van Langendonckt
A
A
Department of Gynecology, In Vitro Fertilization Unit, Catholic University of Louvain, Cliniques Universitaires St. Luc, Brussels, Belgium.
Wyns
C
C
Godin
P A
PA
Toussaint-Demylle
D
D
Donnez
J
J
D000328:Adult; D001755:Blastocyst / Q000502:physiology*; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014430:Twins, Monozygotic; D016216:Ultrasonography, Prenatal