Effect of Anticoagulant Therapy on Endometrial Receptivity and Pregnancy Outcomes in Infertility

Inclusion Criteria: * Female patients aged 20 to 45 years. Clinically diagnosed with infertility and planning to undergo embryo transfer or monitored conception cycles. Patients who have complete baseline clinical data and are willing to undergo multimodal ultrasound evaluation of endometrial receptivity during the window of implantation. Voluntarily agreed to participate in this observational study and signed the informed consent form for data collection. Exclusion Criteria: * Presence of congenital uterine malformations (e.g., septate uterus, bicornuate uterus, unicornuate uterus) that significantly alter the endometrial cavity. Presence of untreated severe intrauterine lesions, such as submucosal fibroids, severe intrauterine adhesions, or endometrial polyps that may mechanically interfere with implantation. Severe underlying systemic diseases, including but not limited to severe liver or kidney dysfunction, or malignant tumors. Known severe bleeding disorders or strict contraindications to anticoagulant medications (for patients in the routine clinical care setting). Patients who are unable to cooperate with the transvaginal multimodal ultrasound examination or complete the required follow-up for pregnancy outcomes.