A Multicenter, Prospective, Randomized Controlled Clinical Study on the Effect of Hysteroscopic Uterine Septum Resection on IVF-ET Outcomes in Infertile Patients With Non-recurrent Miscarriage

(1) Recurrent miscarriage; (2) Combined with untreated intramural uterine fibroids larger than 3 cm, intrauterine adhesions with an AFS score of ≥5 points; (3) Uncontrolled endocrine disorders, such as abnormal thyroid function (FT3, FT4 abnormal), hyperprolactinemia (greater than 2 times the upper limit of normal), combined with atypical endometrial hyperplasia or malignant lesions, acute inflammation of the reproductive system, coagulation dysfunction, etc.; if combined with endometrial polyps or submucosal fibroids, they can still be included in the group after resection; (4) Combined with adenomyosis (uterine body>50 days of pregnancy), chocolate cysts with a diameter of>4 cm, or severe dysmenorrhea and clear DIE lesions (diameter>1 cm) can be palpated by gynecological triple examination; (5) Untreated severe hydrosalpinx (diameter>3 cm) or hydrosalpinx with reflux confirmed by ultrasound; (6) Other important organ diseases and other surgical contraindications or relative contraindications; other conditions that are not suitable for assisted reproductive treatment; (7) Have participated in other interventional clinical studies (within the last three months).