A urine pregnancy test can typically detect pregnancy about two weeks after conception, according to the APA, whereas a blood pregnancy test can detect pregnancy seven to 12 days after … During the early weeks of pregnancy, hCG is important in maintaining function of the corpus luteum. Walk-In Lab sells routine blood tests online through LabCorp and Quest Diagnostics. Enter your zip code to find a LabCorp or Quest location near you. With SneakPeek At-Home, you receive a test kit that provides everything you need to take the test, from the comfort of your home.Three lancets are included that you use to prick your finger to collect 7-10 drops of blood in a small test … Find the best Laboratory Testing near you on Yelp - see all Laboratory Testing open now. The multiple markers include: AFP screening. Screening is usually done by taking a sample of your blood between 15 and 20 weeks of pregnancy (16 to 18 weeks is ideal). Explore other popular Health & Medical near you from over 7 million businesses with over 142 million reviews and … Production of hCG increases steadily during the first trimester (8-10 weeks) of a normal pregnancy… Also called maternal serum AFP, this blood test measures the level of AFP in your blood during pregnancy. A pregnancy test detects hCG in the blood or urine and confirms or rules out pregnancy.