45 days after transplant, the actual gestational week is about 60 days. If your menstrual period is regular and the gestational sac grows okay after transplantation, 45 days after transplantation, the fetal buds are around 2.0cm and you can hear the fetal heart. As long as the buds and the fetal heart are normal, it means that the transplantation is successful, and the chances of continuing the pregnancy are still relatively high, so you can go to the next step of fertility preservation treatment. You can take the pills to strengthen the kidney and stabilize the fetus, or you can supplement the estrogen and progesterone to improve the pregnancy conception rate, and you can also further promote the growth of the fetal buds and the stabilization of the fetal heart.