A member asked:

So are you actually pregnant before or after implantation? do u/s pick up the day you conceived dating your pregnancy that way, or u/s go by your lmp?

A doctor has provided 1 answer
Dr. Khurram Rehman answered

Specializes in Fertility Medicine

After implantation: Pregnancy starts with embryo implantation. Clinical pregnancy/ 'knowing you're pregnant' starts with a pregnancy test, a missed period or pregnancy symptoms after implantation has already happened and the pregnancy is making enough HCG hormone to show up in your blood and urine. If you don't know your LMP or are irregular, ultrasound can estimate how far along you are, reported as weeks from lmp.

Answered 2/13/2015

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