[Difficult embryo transfer: what can be done in practice?]

Embryo transfer is an important step in the success of IVF treatment. One must avoid, at all cost, difficult transfers provoking bleeding, uterine contractions, and the retention of the embryo in the cervix, or even, its expulsion. Evaluation before IVF treatment, including a trial transfer, should allow one to evaluate the transfer step, anticipate problems, and thus improve treatment. The difficult insertion into the womb is most often associated with the presence of curves, which can be easily overcome by using pre-curved catheters.