In the case of natural conception, pregnancy can be detected about two weeks after intercourse. In the case of outpatient ovulation treatment, pregnancy can be detected two weeks after ovulation. In the case of IVF transfer, after the transfer of blastocysts, pregnancy can be detected 12 days after the transfer. If the embryos are transferred on the third day, the pregnancy test can be done 14 days after the transfer. Some people have early implantation and may be able to test earlier than these times. Generally speaking, you can use test strips, blood HCG or ultrasound to check for pregnancy. First of all, blood HCG is the earliest way to detect pregnancy and is more sensitive and reliable. Secondly, urine pregnancy test paper, and then ultrasound, generally ultrasound is more than ten days after menopause, the uterine cavity can see the gestational sac.