In vitro twins require a woman to have good reproductive conditions and both embryos can be implanted at the same time. 1. Women have good reproductive conditions: When women undergo IVF for twins, they need to undergo a detailed gynecological examination to analyze whether there is enough uterine cavity environment and whether the ovarian function meets the function of twins’ implantation according to the data. For example, if there are problems of uterine inflammation and endometrial thickness, the chance of success is usually relatively small. 2. Meet the conditions that two embryos can be implanted at the same time: therefore, the number of embryos is also a requirement that must be met by IVF twins. In addition, the success of IVF twins is affected by many factors, so it is recommended to be prepared. If you have any other questions, it is recommended to consult a professional doctor for guidance.