In the first week from the alleged conception, it is unlikely that it will be possible to establish the fact of pregnancy. The amount of hormone secreted by the placenta has not yet increased much, so pharmacy tests and laboratory tests will not show anything. But in the first week of the delay, you can already see the desired two strips. As a rule, the concentration of the hormone rises after 7-10 days from the moment of conception. Ultrasound in the first expected week of pregnancy is also not prescribed. It will still not work to see the embryo and establish the pregnancy that has arisen. Ultrasound can be performed as an examination of the endometrium of the uterus and the exclusion of various pathologies. Also, women undergo diagnostics if artificial insemination has taken place. Then the doctor controls the implanted egg.