Describe a standard practice and assessment using OPUS simulators as part of the curriculum of the practical component of the ISUOG Basic Training (BT) Course. ISUOG BT course in Medellín, Colombia, June-August 2022, in Spanish; theoretical and practical component in 2 parts, 4 days each. 32 lectures virtually/in person, 70 delegates from Colombia and Latin America. 29/70 delegates practical component, 25/29 obstetrics and gynecology residents with no ultrasound experience from 4 Universities, into 5 groups, rotated in 5 stations,1 hr each; 5th room: 6 O.P.U.S Volutracer simulators. Evaluation with simulator was carried out on the first day of practice (pre) and day 4 (post). Curriculum of 12 obstetrics planes as in the ISUOG 20+2 guideline 6 gynecology planes. 2 OPUS units installed in each university for 2 months. Data from use of simulators by each participant: score of every plane achieved, time of scan per view, path, pauses (index of hesitance), linear and ellipse measurement (with scoring of precision), availability of each cine-loop scanned. Analysis by planes: No statistical difference overall in mean best scores for the 18 planes, after completion of the practical component of the course 6.6 (SD 1.8) vs. 6.6 (SD 1.9) p value 0.9. For 13/18 planes (72%) the mean score improved or remained stable. 4/5 planes with worsening scores of heart views. Analysis by participants: trend for improvement of the mean best score obtained by each participant not statistically significant 5.7 (SD 2.7) vs. 6.0 (SD 2.5) p value 0.076. There was a significant reduction in the time spent to get the best scores before/after practical 61.8 vs. 45.6 seconds, p < 0.001 (figure 1). Use of the Volutracer OPUS simulator allows the analysis of performance of participants and evaluation of the quality of planes as an adjuvant technique for teaching of ultrasound in obstetrics and gynecology. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.