The role of daphelin before in vitro fertilization. IVF technology is widely used in infertility treatment, but the success rate is still limited. In order to improve the success rate, doctors often require patients to take difeline before in vitro transplantation. Difeline is an anti-estrogen drug that targets estrogen in women. During IVF treatment, Difelin has many functions, including controlling cycles, increasing implantation rates, preventing miscarriage, and improving immune function. Controlled cycle test tube transplantation requires a woman’s first trimester