HIF1A and endometriosis: To further clarify the connection of circ_0007331, miR‐200c‐3p and HIF‐1α in the endometriosis progression, we established endometriosis model mice by implanting mouse endometrial fragments into the abdominal cavity, following treated with circ_0007331 shRNA, shRNA NC and anti‐miR‐200c‐3p.