The body is very tired after 4 days of frozen embryo transfer. Consider changes in hormone level, embryo implantation, and mental stress. 1. Hormone level changes: It is possible that the embryo may have implanted after 4 days of frozen embryo transfer, at this time the body’s hormone level will change, which will cause the body to feel very tired. 2. Embryo implantation: the body is tired after 4 days of embryo transfer, or it may be implanting, some women’s bodies are more sensitive, there will be some clinical symptoms at the time of implantation, such as drowsiness, fatigue, etc., and they feel that their energy has decreased significantly. 3. Mental stress: some women are worried about not being able to get pregnant successfully after frozen embryo transfer, and they are under more mental stress, and they may also have a feeling of being physically tired. If you are tired after 4 days of embryo transfer, you can communicate with your doctor in time and deal with the situation accordingly. Pay attention to rest, avoid doing strenuous exercise, eat a nutritionally balanced diet, keep your bowels clear, and keep a relaxed mind.