Would blocked fallopian tubes show up on a transvaginal ultrasound?

Possible: If the us shows dilated fallopian tubes this can be then evaluated by other means. If the us is normal though, it does not necessarily mean they are opened. Dye would need to be injected and a hysterosalpingogram (x=ray) to see if the dye spills out.

Probably not: The fallopian tubes are not distinguishable with ultrasound, transvaginal or transabdominal. As dr. Kobasa notes a dilated fallopian tube may be seen on an ultrasound, but most blocked fallopian tubes are not dilated.