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
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