In order to investigate whether the occupation of men affects their childbearing status, a research team of the National University of Singapore conducted a survey of 640 men whose spouse was unable to conceive or was undergoing infertility treatment. The survey results showed that men in the teacher occupation were not better than ordinary men. The probability of childbirth is 7 times higher, and the probability of male infertility in financial analysis is 5 times that of ordinary males. The male infertility rate in engineering technology and company and computer management is 3 times that of ordinary males. Men who work in services or clerk jobs have the lowest chance of suffering from infertility. In addition, the survey also found that male smokers are three times more likely to smoke than men who never smoke.
Although researchers have not been able to accurately explain the reasons for the above differences, they point out that psychological stress, high work requirements and possible electromagnetic field work environment are all major factors that cause male infertility.
The fundamental difference from traditional electric scooters, battery scooters, bicycles and other transportation tools is that electric wheelchairs have intelligent operating controllers. According to the different operation methods, there are rocker-type controllers, and controllers controlled by various switches such as the head or blowing system. The latter is mainly suitable for severely disabled people with upper and lower limbs. Nowadays, electric wheelchairs have become an indispensable means of transportation for the elderly and the disabled. It is suitable for a wide range of objects. As long as the user has a clear consciousness and normal cognitive abilities, the use of electric wheelchairs is a good choice, but it requires a certain amount of space for activities.
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