The vague pain in the stomach on the eighth day after blastocyst transfer can be rested more or seek medical treatment in time. 1. Rest more: the vague pain in the stomach on the eighth day after blastocyst transfer may be caused by mechanical injury during the transfer process or pain in the period of implantation, at this time, generally speaking, you can pay attention to rest more, do not overexertion, and it can be relieved on its own. 2. Timely medical treatment: If the hidden pain in the stomach accompanied by vaginal bleeding occurs on the eighth day of blastocyst implantation, then it is necessary to consider whether it is caused by inflammation, preeclampsia, ectopic pregnancy and so on, and it is necessary to consult the doctor in time and choose the appropriate treatment. Therefore, pregnant women with vague pain in the stomach after the transfer need to consult a doctor in time to clarify the specific causes and take appropriate methods of intervention.