How much self-employment tax will I pay? Self employment taxes are comprised of two parts: Social Security and Medicare. You will pay 6.2 percent and your employer will pay Social Security taxes of 6.2 percent on the first $127,200 of your covered wages. You each also pay Medicare taxes of 1.45 percent on all your wages - no limit.
Blood or protein in the urine may cause false-positive pregnancy results. Urine hCG tests may give a false-negative result if the urine is too diluted or if testing is done too soon in the pregnancy. Certain drugs such as diuretics and promethazine (an antihistamine) may cause false-negative urine results.
Definition. The quad screen â also known as the quadruple marker test or simply the quad test â is a prenatal test that measures levels of four substances in a pregnant woman's blood: 1  Alpha-fetoprotein (AFP), a protein made by the developing baby. 2  Human chorionic gonadotropin (HCG), a hormone made by the placenta.