Vaginal bleeding at 9 weeks of IVF transplantation may be caused by preeclampsia, or cervicitis, etc., and temporary observation or medication should be taken according to the causative factors. 1. Pre-eclampsia: Vaginal bleeding at 9 weeks of IVF transplantation, we should go to the hospital in time, do ultrasound, test progesterone, if the ultrasound shows that the fetus is developing well, the value of progesterone is low, you need to be guided by the doctor under the guidance of the fertility preservation treatment, such as oral progesterone capsules, etc.. 2. Cervicitis: If the pregnant woman herself suffers from cervicitis and is not treated in time after implantation, it may cause mucosal edema and congestion, leading to cervical bleeding. Cefixime should be taken orally as prescribed by the doctor. Vaginal bleeding at 9 weeks of IVF transplantation may have other causes, which should be taken seriously, and timely consultation should be made to clarify the diagnosis and treat the cause.