Normally, it will require quite a few weeks for that placenta cells to generate adequate levels of the hormone human chorionic gonadotropin (hCG), which can be detected via a blood examination. It can be advised for patients to chorus from having a pregnancy test right away immediately after embryo transfer. https://www.digitaljournal.com/pr/news/insights-news-wire/ivf-mexico-best-fertility-clinic-1465491918.html