You can swim during pregnancy preparation, but it is usually not recommended to go to the swimming pool. Swimming pools are public places, and if the water is not sterilized or changed in time, there are certain bacteria or viruses in the water, which may cause vaginitis or pelvic inflammatory disease and affect fertility. In addition, if you do not know that you are pregnant, swimming may also lead to poor embryonic development, or even cause miscarriage. Therefore, it is best not to go swimming during the preparation period, especially if you have a history of habitual miscarriages or if you are pregnant at an advanced age. Women should avoid swimming or taking a bath during pregnancy to prevent infection. In addition, during the preparation period, you need to take folic acid tablets under the guidance of your doctor to prevent the occurrence of fetal neural tube defects, and pay attention to the observation of menstruation, if there is a delay in menstruation, you need to go to the hospital as soon as possible to check to determine whether you are pregnant.