Yellow jelly-like discharge at 20 weeks of pregnancy is considered normal cervical mucus if not accompanied by discomfort. If it is accompanied by uncomfortable symptoms, it is considered to be caused by urethritis, cervicitis and other diseases. 1. Normal phenomenon: During pregnancy, due to the continuous effect of progesterone, the secretion will become sticky and slow to be discharged, which may be manifested as yellow jelly-like secretion. If the pregnant woman is not accompanied by physical symptoms, it is considered a normal phenomenon, no need to worry too much. 2. Urethritis: Urethritis is mainly caused by pathogen infection. Patients can appear frequent urination, urethral itching, urethral secretion abnormal symptoms, some patients may be manifested as yellow jelly-like secretion. 3. Cervicitis: Cervicitis is caused by pathogen infection, vaginal flora disorders, hormonal imbalance and other factors. Patients may have increased leukorrhea, yellowish, purulent, accompanied by itching, burning and other uncomfortable symptoms, manifested as yellow jelly-like secretions. In conclusion, there are many reasons that lead to yellow jelly-like discharge at 20 weeks of pregnancy, and it is recommended that patients seek timely medical treatment to treat the cause.