LAUSR

BACKGROUND Implantation failure remains a mystery since decades. This procedure needs a "top quality embryo" and a "normal" uterine cavity. To assess uterine cavity before first in vitro fertilization (IVF), many diagnostic tools could be used. Hysteroscopy remains the gold standard to diagnose and treat intra-uterine anomalies. However, it is not clearly recommended to offer an office hysteroscopy before first IVF when transvaginal ultrasound (TVUS) and hysterosalpingography (HSG) were normal. PURPOSE This study aimed to assess the role of office hysteroscopy before first IVF when no intra-uterine anomalies are suspected. BASIC PROCEDURES We conducted a randomized controlled trial including 171 women scheduled for their first IVF. Women were assigned to either Group I: office hysteroscopy before IVF or Group II: immediate IVF. We included women aged less than 40 years, having regular cycles, FSH levels less than10UI/l, antral follicular count ≥12, normal TVUS and HSG. Their body mass index (BMI) ranged from 19 to 30 kg/m2. We excluded patients known having severe endometriosis, polycystic ovarian syndrome (PCOS) and oocyte receivers. The primary outcome were livebirth rate and clinical pregnancy rate. MAIN FUNDINGS Between january 2016 and september 2017, we randomly assigned 171 women to either Group I (n = 84) or Group II (n = 87). Hysteroscopy was done in the mid-follicular phase immediately before IVF. Baseline characteristics and IVF features were comparable between groups except for the IVF protocol. Live birth rate was 23,9% in Group I versus 19,3% in Group II. (p = 0,607). Clinical Pregnancy rate was 32,4% in Group I versus 21,7% in Group II. (p = 0,326). No statistical significance was observed for neither miscarriage rate nor multiple pregnancy rate. Hysteroscopy showed 30% unsuspected intra-uterine anomalies: 11 intra-uterine adhesions, 7 polyps, 7 clinical endometritis and one fibroid print. Therapeutic hysteroscopy was done only for 6 intra-uterine adhesions and 3 polyps. Other anomalies did not require operative hysteroscopy. Visual analog score during hysteroscopy was 4,69 +/-2,892. 5 women (6%) of Group I experienced discomfort during diagnostic hysteroscopy. Only one patient had vagal syncope. No further complications were observed. PRINCIPAL CONCLUSIONS Office hysteroscopy before first IVF seems not improve IVF results. Minimal intra-uterine anomalies not diagnosed by transvaginal ultrasound and hysterosalpingography do not seem to reduce IVF results.