Usually, it will require several weeks for the placenta cells to deliver sufficient levels of the hormone human chorionic gonadotropin (hCG), which can be detected via a blood exam. It's suggested for sufferers to refrain from using a pregnancy examination instantly following embryo transfer. In relation to IVF achievements rates https://www.digitaljournal.com/pr/news/insights-news-wire/ivf-mexico-best-fertility-clinic-1465491918.html