Once retrieved, the eggs are fertilized with sperm in a lab dish, with hopes of successful fertilization. The resulting embryos are cultured and monitored for various days to guarantee ideal development. The eggs are noticed carefully for indications of mobile division, that is when fertilization is deemed to obtain occurred. https://www.digitaljournal.com/pr/news/insights-news-wire/ivf-mexico-best-fertility-clinic-1465491918.html