Mycoplasma urealyticum is a normal microorganism in the lower genital organs such as the vagina. 50% of healthy people carry Mycoplasma urealyticum, so there is no need to test the vagina for Mycoplasma urealyticum, just like there are definitely bacteria on the hands, there is no need to sterilize the hands to make them sterile, the vagina can maintain the normal vaginal microorganism without going up to the uterus and it will not cause disease. Mycoplasma. Mycoplasma urealyticum can be brought to men during sexual intercourse, but it is usually gone after washing, and also healthy men can keep it from going up to other higher parts of the body, so there is little practical significance in whether it is infectious. Mycoplasma urealyticum does not affect fertility in general. Nearly 40% of women who are pregnant and 40% of women who have had children are positive for Mycoplasma urealyticum.