Estradiol didroxyprogesterone tablets have certain fetal preservation effects in the early stages of intrauterine pregnancy. After the fertilized egg is successfully implanted in the endometrium, estradiol application can correspondingly increase the blood supply to the uterine arteries, which has certain maintenance effects on the early embryo. Dydrogesterone, as a progestogen, provides luteal support at this time in the early stages of intrauterine pregnancy, further promoting embryogenesis and development, and is also more important for early embryo maintenance. As intrauterine pregnancy progresses, after the tenth week of pregnancy, as the corpus luteum gradually takes over the function of the placenta, the above mentioned drug will gradually take a secondary role and can be discontinued at an appropriate time. Therefore, estradiol digoxigenin tablets are useful for fetal preservation.