4 doctors weighed in:

How many weeks can an ectopic pregnancy be detected?

4 doctors weighed in
Dr. Gerard Honore
Fertility Medicine
3 doctors agree

In brief: Suspected

Ectopic can sometimes be suspected by 4 weeks ega (or before) based on blood levels.
At 4 weeks (2 weeks after the missed expected menstrual period) it's still unlikely to positively identify ectopic on ultrasound. It's often difficult or impossible to make a 100% certain diagnosis until 5, 6, or later weeks ega; but ectopic can be strongly suspected before then.

In brief: Suspected

Ectopic can sometimes be suspected by 4 weeks ega (or before) based on blood levels.
At 4 weeks (2 weeks after the missed expected menstrual period) it's still unlikely to positively identify ectopic on ultrasound. It's often difficult or impossible to make a 100% certain diagnosis until 5, 6, or later weeks ega; but ectopic can be strongly suspected before then.
Dr. Gerard Honore
Dr. Gerard Honore
Thank
Read more answers from doctors