The advantages and disadvantages of third generation IVF are as follows: 1. Advantages: Preferential selection of embryos through this type of technology. If a woman has recurrent miscarriages, normal embryos can be selected through PGS technology to reduce the possibility of miscarriage. Couples with familial genetic disorders can eliminate abnormal embryos through PGD technique and transfer normal embryos to ensure a healthy fetus. 2. Disadvantages: This technique has more interventions and cells must be removed from living embryos, which can cause damage to the embryo. Therefore, the indications for third generation are more strictly controlled.