A client, who underwent in-vitro fertilization, presents at the OB-GYN clinic for pregnancy testing. When teaching the client about the test, which statement is appropriate?
A) "We will draw blood to determine if you are pregnant. Early pregnancy factor (EPF) is detected in your blood 24 to 48 hours after fertilization."
B) "Please provide a urine sample. Early pregnancy factor (EPF) is detected in your urine 24 to 48 hours after fertilization."
C) "We will draw blood to determine if you are pregnant. Human chorionic gonadotropin (hCG) is detected in your blood 24 to 48 hours after fertilization."
D) " Please provide a urine sample. Human chorionic gonadotropin (hCG) is detected in your blood 24 to 48 hours after fertilization."
Answer: A
EPF, an immunosuppressant protein, is secreted by the trophoblastic cells of the developing embryo. This factor appears in the maternal serum within 24 to 48 hours after fertilization and forms the basis of a pregnancy test during the first 10 days of development. hCG can be detected in both the blood and the urine 7 to 12 days after conception.
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