After the retrieval procedure, you will be told how many oocytes in total were retrieved. Only mature eggs can be fertilized and therefore only mature eggs are injected with sperm. The next morning they are observed under a microscope, and the presence or absence of fertilization is determined. That morning you will receive a phone call regarding how many eggs were mature for ICSI and how many fertilized. This is when the day of your transfer will be decided.  Fertilized embryos remain in culture media in the incubator until they are transferred into the patient’s uterus and/or cryopreserved. Embryos are only checked on Day 1, Day 3, Day 5 and Day 6. At the end of your cycle, you can find a Patient Summary report in the Patient Portal.