![Morphological types of tubal ectopic pregnancy (EP) as seen on transvaginal ultrasound (TVS): (a,b) Probable tubal EP is suggested by observation of blob sign (a) or bagel sign (b). (c,d) Definite tubal EP is diagnosed on visualization of a gestational sac and either non-viable embryo (c) or embryo with cardiac activity (d).

Nadim, B., Infante, F., Lu, C., Sathasivam, N. and Condous, G. (2018), Morphological ultrasound types known as ‘blob’ and ‘bagel’ signs should be reclassified from suggesting probable to indicating definite tubal ectopic pregnancy. Ultrasound Obstet Gynecol, 51: 543-549. https://doi.org/10.1002/uog.17435](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/beac3416-992f-4c1a-832a-27f446352a0a/Untitled.png)

Morphological types of tubal ectopic pregnancy (EP) as seen on transvaginal ultrasound (TVS): (a,b) Probable tubal EP is suggested by observation of blob sign (a) or bagel sign (b). (c,d) Definite tubal EP is diagnosed on visualization of a gestational sac and either non-viable embryo (c) or embryo with cardiac activity (d).

Nadim, B., Infante, F., Lu, C., Sathasivam, N. and Condous, G. (2018), Morphological ultrasound types known as ‘blob’ and ‘bagel’ signs should be reclassified from suggesting probable to indicating definite tubal ectopic pregnancy. Ultrasound Obstet Gynecol, 51: 543-549. https://doi.org/10.1002/uog.17435