The Role of Erzhi Tiangui Formula in Expected POR Women Undergoing IVF-ET

Women aged 35 to 43 years with POR who were scheduled for IVF or intracytoplasmic sperm injection (ICSI) treatment were eligible for enrollment. The diagnosis of POR was based on the Bologna criteria. Women were excluded if they: (i) had a body mass index (BMI) ≥ 35 kg/m2; (ii) failed to obtain clinical pregnancy after three or more IVF/ICSI cycles; (iii) had a history of two or more recurrent pregnancy losses; (iv) were diagnosed with uterine abnormalities using hysteroscopy or diagnosed with hydrosalpinx using hysterosalpingography; (v) had a history of chemotherapy with cytotoxic agents, pelvic radiotherapy, or severe systemic diseases; (vi) had taken Chinese herbal medicines or other therapies affecting ovarian function within three months before study enrollment; or (vii) were allergic to the ingredients of EZTG granules or placebo.