STAT3 and ovarian cancer: Taking Astragalus as an example, its core active component, quercetin, has been demonstrated in studies on anti-ovarian cancer mechanisms to exert its effects by inducing endoplasmic reticulum (ER) stress, apoptosis, and autophagy through the p- signal transducer and activator of transcription 3 (STAT3)/Bcl-2 axis 13.