Generally, pregnancy can be detected 7-14 days after conception, which can be detected by early pregnancy test paper or blood HCG measurement, but the most accurate is ultrasound examination.
The fertilized egg usually starts to implant on the 6th-7th day after sexual intercourse, and the HCG level starts to rise 1 day after the implantation of the fertilized egg, therefore, blood can be drawn for HCG measurement on about 7-8 days, and a urine pregnancy test can be performed on about 14 days after intercourse to detect pregnancy.
However, it is not possible to determine whether the gestational sac is located in the uterus or outside the uterus. It is recommended that an ultrasound examination be performed at 6 weeks after menopause, and if the gestational sac and fetal heart buds are seen inside the uterus, intrauterine pregnancy can be diagnosed.
If the patient wants to determine the pregnancy, it is recommended to visit the hospital in time to improve the blood HCG test, the results are more accurate.