The goal of this clinical trial is to examine whether GLP1-RA and healthy lifestyle education in women with PCOS and obesity prior to fertility treatment improves live birth rate and other reproductive, maternal and perinatal outcomes compared to metformin plus healthy lifestyle education.

Inclusion Criteria:

• Women with a wish to conceive;
• Women with PCOS (Rotterdam criteria);
• 28 kg/m2≤BMI<35kg/m2;
• Age: 18-40 years old

Exclusion Criteria:

• Women with diseases unsuitable for pregnancy or any other contraindications to infertility treatment Endocrine disorders; Abnormalities in liver and kidney function; Other medications such as glucocorticoids, anti-androgen drugs ;(spironolactone, cyproterone acetate, flutamide, etc.) within the last 3 months; Acute infections, severe cardiovascular disease, malignant tumors; Ongoing weight loss therapy (>5% weight loss in the last 3 months) or history of gastrointestinal surgery; Uterine abnormalities that may affect assisted reproductive outcomes, untreated hydrosalpinx Male azoospermia, severe oligozoospermia and asthenospermia, or patients receiving donor sperm treatment Chromosomal abnormalities, patients planning preimplantation genetic testing (PGT) or donor oocyte treatment History of recurrent miscarriag Allergic to or contraindicated for GLP-1 class medications.