Abstract: Facing to young patients with borderline ovarian tumors（BOTs），fertility preservation surgery is the best option to preserve fertility. Fertility preservation surgery is acceptable not only for patients with early-stage BOTs but also for someone with noninvasive extra-ovarian implants which can be resected completely. The pregnancy outcomes after surgery is recognized and most of the pregnancies have been achieved spontaneously. The complications followed by pregnancy are few，and pregnancy seems to have little impact on disease progression. Superovulation drugs are tolerated in early-stage BOTs patients who experience infertility after surgery，but it should be caution when using these drugs in advanced-stage BOTs patients after surgery. If the normal ovarian portion cannot be preserved due to massive bilateral ovarian involvement and only the uterus can be preserved，the surgery can not be choosed. But there are several alternative options for fertility preservation，such as embryo freezing，oocyte，ovarian tissue freezing; and using donor ooccytes.

Key words: Ovarian neoplasms, Borderline tumor, Therapy, Fertility, Pregnancy