2.3.1. Inclusion criteria.
infertility, uterine anatomic abnormalities
PROLIFERATIVE, DYSFUNCTION
Patients who have never had a biochemical pregnancy even after three or more ET cycles with morphologically good-quality embryos (regardless of fresh embryo, frozen embryo, early embryo, and blastocyst); a total of four or more embryos are used for ET. Ectopic pregnancies are not included in biochemical pregnanciesPatients in whom the cause of infertility has not been identified despite infertility evaluations including ovulatory dysfunction, tubal patency, uterine anatomic abnormalities, cervical factors, and quality and quantity of the partner’s spermAged at least 18 years, but below 40 years at the time of registrationTh1/Th2 cell ratio ≥ 10.3 in the peripheral blood collected during the proliferative phase of the menstrual cyclePatients with frozen embryos that are already stored for the purpose of assisted reproductive technologyPatients who can continue to visit or be hospitalized throughout the study periodPatients who are fully informed about the implementation of this study and have given their consent along with their partners in a document approved by the Clinical Research Review Board