36 year-old G2P1A1 female with a history of infertility × 3 years, presenting for baseline assessment of tubal patency prior to initiation of ART. HSG demonstrates normal contour of the endometrial cavity. The left fallopian tube opacifies normally and demonstrates free intraperitoneal spill. The right fallopian tube fills with contrast, but terminates abruptly near its terminus (arrowhead). No right sided contrast spill is identified, diagnostic of distal tubal obstruction. This tubal obstruction was not appreciated on TVS or HSC