A pregnancy test can usually be done with a test strip around the 14th day after intercourse, and women who are preparing for pregnancy can significantly increase their chances of conception by having intercourse during ovulation. A blood test for HCG can be done about 10 days after intercourse and is the earliest method of checking for pregnancy, with a higher rate of accuracy.HCG appears in the blood about 10 days after intercourse, and thereafter begins to appear in the urine. Urine HCG appears later than in blood, so you can usually test for pregnancy with a test strip when it is about 14 days after intercourse. When pregnancy is detected by urine or blood HCG, ultrasound is also done at about 1 week after menopause to confirm a normal intrauterine pregnancy and to find out how the embryo is developing. After the diagnosis is clear, you should pay attention to proper rest, avoid exertion, increase diet and nutrition, and continue to follow the doctor’s instructions to carry out prenatal checkups on time.