The patient himself cannot accurately determine whether it is retrograde ejaculation or not, and further medical examination is needed to clarify. Retrograde ejaculation can be suspected if the following situations occur. 1. Men have normal ejaculation sensation when they reach orgasm during sexual intercourse, and have normal orgasm, but no semen ejaculation is observed after passing through many times of sexual life. 2. If a male friend has mucus or white flocculent material in the urine during urination after sexual intercourse, he needs to suspect that retrograde ejaculation may have occurred. 3. You can judge by carefully observing whether your own semen volume is less than before. A normal male ejaculation should have a semen volume of about 2 milliliters at one time. If it is too small, retrograde ejaculation may be involved. When retrograde ejaculation is suspected, it is recommended to consult a doctor in time and follow the doctor’s instructions through ultrasound, CT and other aspects of the examination, which can further clarify the nature of retrograde ejaculation, and treatment under the doctor’s comprehensive analysis.