Changes in endometrial thickness, width, length and pattern in predicting pregnancy outcome during ovarian stimulation in in vitro fertilization

Objective To determine whether the clinical features of the endometrium as observed by transvaginal high resolution sonography are predictive of pregn ancy outcome in in vitro fertilization cycles. Patients and Methods One hundred and forty-five patients undergoing in vitr o fertilization were included in this prospective controlled study. Endomet rial thickness, width, length, growth and pattern during the follicular and early luteal phases of stimulated cycles were assessed using transvaginal ultrasound by an operator who was blinded to the protocol of stimulation an d to the type of assisted reproductive technology treatment. The relationsh ip between these findings and embryo implantation and pregnancy outcome was examined. Results There were no significant differences in endometrial thickness, wid th, length, growth and pattern in conception compared to non-conception cyc les. The endometrial growth and its pattern transformation during the stimu lation did not influence the pregnancy outcome. Conclusion The endometrial features as assessed by transvaginal ultrasound do not provide significant prognostic information with regard to the outcom e ofin vitro fertilization.