Can a blood test detect ectopic pregnancy?

Patient's question:

I went to the hospital with my sister a few days ago for a thorough examination. Can a blood test detect ectopic pregnancy?

Doctor's answer:

Blood draw cannot reveal ectopic pregnancy. However, it can be indirectly inferred by observing the doubling rate of the values. The initial value cannot serve as a basis for verification because a low initial value may simply be due to a delayed delivery time. It is necessary to compare the doubling of values in two instances. If the values are very low and the doubling rate is poor, there is a high likelihood of ectopic pregnancy. Of course, it may also be due to poor embryo quality, and further evaluation with ultrasound is needed for a comprehensive assessment.

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