A 32-year-old female asked:
If embryo isn't connected to maternal blood supply until 7days post conception, this would mean hcg isn't yet produced for a urine pregnancy test?
1 doctor answer • 1 doctor weighed in
Fertility Medicine 47 years experience
No: The embryo can produce HCG as early as 5 days post fertilization but the amounts are so small and the maternal-fetal blood connections are so minimal that not even a blood test can pick it up, let along a urine pg test that is not positive until your HCG levels are 20 iu/ml or more. You should, however, be able to pick up HCG in a blood test as early as day 9 post ovulation but the levels are low.
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5.2k viewsAnswered >2 years ago
Last updated Mar 10, 2019
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