THC Drug Test. A marijuana drug test is the technical analysis of a biological specimen, such as urine, blood, hair, sweat or saliva, to determine the presence or absence of the active ingredients of marijuana (mainly THC) or its metabolites (breakdown products).t is important to note that urine tests are usually conducted to test for the presence of THC metabolites which indicates marijuana use. Blood tests are conducted when the amount of THC still present in the system has to be ascertained.
How is my due date calculated? Your due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (assuming a 28 day cycle). Note that your menstrual period and ovulation are counted as the first two weeks of pregnancy. If you deliver on your due date, your baby is actually only 38 weeks old, not 40.
One can calculate the age of the baby from the last menstrual period (LMP) â the result of this calculation will provide the gestational age. Importantly, the exact date of conception is almost impossible to know.Typically, the baby will be due 40 weeks after the first day after your last menstrual period.alculating Time of Conception and Due Date. Our KnowtheGender baby gender test can be performed as early as the 9th week of pregnancy (the person taking the test must be 9 weeks pregnant, with counting commencing from the first day of the last menstrual period).