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Semen is normally a whitish-gray color. It's usually quite thick after ejaculation, but liquefies within 30 minutes. Changes in the appearance of semen might be temporary and not a health concern. However, sometimes these changes can be a sign of an underlying medical condition that requires further evaluation.emen is normally a whitish-gray color. It's usually quite thick after ejaculation, but liquefies within 30 minutes. Changes in the appearance of semen might be temporary and not a health concern. However, sometimes these changes can be a sign of an underlying medical condition that requires further evaluation.
By Dr. Ananya Mandal, MD. Semen is a greyish white bodily fluid that is secreted by the gonads of male animals. It carries sperm or the spermatozoa and fructose and other enzymes that help the sperm to survive to facilitate successful fertilization.The whitish opalescence is due to the large amount of protein that it contains and its slightly turbid appearance is due to the spermatozoa contained within it.he seminal vesicles release their part of the semen that combine with the sperm. The ejaculation is unstoppable at this stage. Phase 2: ejaculation in which the muscles at the base of the penis and urethra contract.