If you have intercourse after taking an egg-breaking injection, you can detect early pregnancy on the 7th day, and the exact time varies from person to person. The main ingredient of the injection is human chorionic gonadotropin, which can induce the mature follicle to break the shell and then discharge the egg smoothly. After the injection, the egg is usually discharged within 24 hours, which is when the chances of conception are highest. After the fertilized egg has been laid, the blood chorionic gonadotropin (HCG) will gradually rise. Generally speaking, the blood HCG test can detect early pregnancy around 7 days after fertilization, while the urine HCG test will take 10-14 days. However, it is important to note that even with an egg-breaking injection, successful conception does not necessarily follow. The prerequisite for a successful pregnancy is a mature follicle and high quality sperm, and that the sperm and the egg can successfully combine to form a fertilized egg and implant in the uterus. After the injection, you should pay attention to rest, do not do tired work, ensure enough sleep and good mood, eat a regular and nutritious diet, eat more fresh fruits and vegetables and meat, eggs and milk, etc., to provide a good foundation for the development of the fetus.