In-vitro maturation and cryopreservation of oocytes at the time of oophorectomy

卵巢切除术时卵母细胞的体外成熟和冷冻保存

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Abstract

A 27 year old female presented for fertility preservation prior to undergoing pelvic radiotherapy. She had previously undergone a radical laparoscopic hysterectomy for cervical carcinoma seven months earlier. A trans-vaginal oocyte aspiration was not advisable due to a vaginal recurrence of the disease. Due to a polycystic ovarian morphology (PCO), follicle stimulating hormone (FSH) priming with no human chorionic gonadotrophin (hCG) trigger was performed prior to oophorectomy followed by ex-vivo oocyte aspiration and in vitro maturation (IVM). All visualized follicles were punctured and follicular fluid aspirated. There were 22 immature oocytes identified and placed into maturation culture for 24 h. After this time, 15 oocytes were deemed to be mature and suitable for vitrification. Following an additional 24 h in maturation culture of the remaining 7 oocytes, three more were suitable for cryopreservation. The patient recovered well and progressed to radiotherapy three days later. This report demonstrates the use of IVM treatment to store oocytes for oncology patients in time-limited circumstances.

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