What are the theories of infertility?

Genetic factors: Genetic disorders can affect both male and female fertility. In men, genetic conditions can affect sperm production or function. In women, genetic conditions can affect ovulation, the development of the uterus or fallopian tubes, or the production of hormones necessary for reproduction.

Age: Fertility naturally declines with age, especially in women. This is because the number and quality of eggs a woman produces decreases as she gets older. In men, sperm production and function can also decline with age, although not as dramatically as in women.

Environmental factors: Exposure to certain environmental toxins, such as lead, mercury, and pesticides, can affect fertility in both men and women. Other environmental factors that can contribute to infertility include smoking, excessive alcohol consumption, and obesity.

Lifestyle factors: Certain lifestyle factors can also affect fertility, such as poor diet, lack of exercise, and chronic stress. In men, excessive heat can also damage sperm production.

Unexplained infertility: In some cases, infertility cannot be explained by any known factor. This is called unexplained infertility and it accounts for about 10-15% of all cases of infertility.