Transmyometrial embryo transfer and junctional zone contractions.

Background: Embryo transfer is a crucial step in IVF-embryo transfer cycles. Several studies have explored transmyometrial embryo transfer, but although this procedure has several favourable characteristics, its role in assisted reproduction has not yet been established. Junctional zone (JZ) contractions during embryo transfer are associated with a negative outcome and factors which increase JZ contractions should be avoided.