A 4-cell embryo can usually be cultured into a blastocyst, but this cannot be guaranteed due to individual circumstances. Blastocyst culture is an assisted reproduction technique in which the fertilized egg, formed by the union of a couple’s sperm and egg, is cultured into a blastocyst in a medically-specific culture solution and then transferred in the uterine cavity. IVF embryos can be categorized into 4 grades such as high quality embryos, poor embryos, generally high quality embryos are 6-8 cell embryos while poor embryos are 3-4 cells. The chances of a 4-cell embryo being cultured into a blastocyst are less, but there is still a chance of success. When a 4-cell embryo is cultured into a blastocyst and transferred into the uterine cavity, the patient will also need to use progesterone injections as prescribed by their doctor to increase the chances of successful conception. When the patient’s 4-cell embryos are cultured to blastocysts and transferred successfully, the patient will need to take supplements containing folic acid during the conception period, which can help prevent neural tube malformations in the fetus.