Abstract: This study aimed to evaluate fertility and oncologic outcomes in women with complex hyperplasia (CH) or complex atypical hyperplasia (CAH) who received fertility-sparing therapy and in vitro fertilization (IVF). Endometrial carcinoma is the most common carcinoma of the female genital tract, and is associated with endometrial hyperplasia (EH) resulting from long-term unopposed estrogenic stimulation of the endometrium. EH is characterized by non-physiological proliferation of endometrium that results in glands with irregular shapes and varying sizes. The World Health Organization (WHO) classified it into four types: simple or complex hyperplasia with or without atypia. CH is characterized by glands with irregular outlines that demonstrate marked structural complexity and back-to-back crowding. Atypical hyperplasia designates a proliferation of glands exhibiting cytologic atypia, in which varying degrees of nuclear atypia and loss of polarity are present. It has been reported that high-dose progestin is safe and efficient for CAH or early-stage low-grade carcinoma for young women who desire fertility-preserving treatment. However, few studies have reported the differences of pregnancy outcomes between patients with CAH and CH, while those patients take a great proportion in people suffered from infertility. More studies about the outcome of IVF are needed. Our aim is to evaluate fertility and oncological outcomes in women with CH or CAH who received fertility-sparing therapy.

Key words: Progestin therapy; Endometrial hyperplasia; In vitro fertilization

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