Going swimming during ovulation will not result in pregnancy unless you have real sex with a man during ovulation and the sperm enters the vagina and uterine cavity and fertilization will result in pregnancy. If you simply go swimming in a public pool, the sperm in the pool will not enter the uterine cavity through the vagina for fertilization, the probability is very rare unless there is real sex inside the pool, so the probability is basically zero. However, the discharge of women during ovulation is more, swimming in public swimming pools may lead to gynecological diseases, such as mycoplasma infection, syphilis, AIDS, etc., but the probability is also relatively small, most of the sexually transmitted diseases are transmitted through sexual life, public swimming pools may also be indirectly transmitted, but the probability is very small.