If a woman arranges intercourse during ovulation to prepare for pregnancy, it should usually be arranged after the appearance of the lasso white band, or in the case of ultrasound monitoring of the follicle discharge, when the follicle is mature and growing and about to be discharged. The fertility of the egg is usually best within 24 hours after ovulation, and if you have intercourse during this period, it usually takes about seven days for the fertilized egg to come to term after ovulation. Because of the difference in the time of fertilization of the fertilized egg, it is recommended that the time to check for pregnancy be extended. Generally, it is more accurate to check the blood hcg 11 days after the last intercourse, or about 16 days after the last intercourse if you are testing with early pregnancy test or pregnancy test. Because of the fear of late fertilization of the egg, if you check too early and have a false negative performance, usually the day after fertilization of the egg, the gestational trophoblast will secrete hcg hormone, which leads to an increase of hcg in the blood, so at this time, check=blood hcg will see that the performance of pregnancy. However, if the fertilized egg does not settle in the uterine cavity, but elsewhere outside the uterine cavity, the settlement may be more than 7 days after ovulation, at which time the hcg will often rise later due to poor growth environment and abnormal embryo development, so the time to check to pregnancy will be extended again.