Find the best Laboratory Testing near you on Yelp - see all Laboratory Testing open now. 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 … Explore other popular Health & Medical near you from over 7 million businesses with over 142 million reviews and … A pregnancy test detects hCG in the blood or urine and confirms or rules out pregnancy. Production of hCG increases steadily during the first trimester (8-10 weeks) of a normal pregnancy… Screening is usually done by taking a sample of your blood between 15 and 20 weeks of pregnancy (16 to 18 weeks is ideal). 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 … Enter your zip code to find a LabCorp or Quest location near you. The multiple markers include: AFP screening. Walk-In Lab sells routine blood tests online through LabCorp and Quest Diagnostics. During the early weeks of pregnancy, hCG is important in maintaining function of the corpus luteum. Also called maternal serum AFP, this blood test measures the level of AFP in your blood during pregnancy.