1-3 weeks
As soon as your first missed period.
You need not wait for birth for a paternity test. One can be done while the baby is still in utero (in the womb or inside its mother).
A pregnancy test after embryo transfer can be done as soon as two weeks after the transfer and yield accurate results.
after you have your first 'normal' period.
Paternity test can be performed with newborn baby and even it can be done on unborn babies through mother's amniotic fluid but its risky process.
On average, an adult should get their cholesterol tested once every 5 years. However, if your family has a history of heart disease, then it should be done more often, at least once per year and as soon as possible.
If it was a test done at home that you mailed to the lab, you should get the results back in the mail. If you had the test performed elsewhere, call who ever ordered the test and they should be able to tell you where the results will go and how soon to expect them.
I think you can find out on the first ultra sound (vaginal).
The typical first test done is a digital rectal exam. Another test is a PSA blood test. The third test is a Transrectal Ultrasound and Biopsy.
as soon as you think you are pregnant ,just take the test to see.
Double marker test is done by blood test.
It's very rare as the blood test is the most accurate. However if it was done too soon it could be false. They are considered accurate 10-14 days after ovulation.