Ob-Gyn questions? Ask a gynecologist online.
hcg level will start to rise about 10 days after conception, so it´s not excluded that there´s a correlation with the contact that happened before the blood test. By measuring the gestational sac and later the embryo´s size it will be possible to schedule the date of conception plus/minus 1 week.
Please don´t forget to honour my work with a kindly rating (3-5 stars).Thanks a lot, all the best for you and your further pregnancy.Dr. N. Scheufele