Preparing for pregnancy sunshine can promote the body’s production of vitamin D, which is conducive to increasing bone density, improve sperm quality and so on. 1. Increase bone density: The ultraviolet rays in the sun can promote the synthesis of vitamin D, thereby increasing bone density and slowing down calcium loss, thus providing a calcium supplement. When the body has enough calcium, the body will be healthier and better prepared to conceive a new life. 2. Improve the quality of sperm: some studies have pointed out that low levels of vitamin D and hypogonadism are related to the human blood testosterone levels will increase with the increase in the body’s vitamin D content, so the sun, for vitamin deficiency in men is conducive to regulating gonadal function, thereby improving sperm quality. In addition, sunbathing can also improve human immunity, prevent skin diseases, so that people maintain a good mood, etc., so it is recommended to prepare for pregnancy can be appropriate sunbathing, if the patient is allergic to ultraviolet rays, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, to take the correct measures to prepare for pregnancy.