Infertility is a diagnosis when the couple is unsuccessful in efforts to conceive even after frequent and unprotected intercourse for 1 year. It can be due to issues with a female partner ( 1/3rd of cases), male partner ( 1/3rd of cases), or both (1/3rd of cases).
Age- This is important in females as fertility declines with age. Both quality and quantity of follicles are reduced because females have a fixed number of eggs at birth which declines with age and new ones are not formed in females. Fertility sharply declines after age 35.
Ovulation- Can be a problem in case of
Hormonal imbalances like a polycystic ovarian disease
A tumour or cyst
Drug or alcohol use
Thyroid or prolactin hormone issue
Weight issues either excessive or underweight
Primary ovarian failure
Uterine and tubal factors
Pelvic inflammatory disease
Previous ectopic pregnancy
Birth defects in the uterus
Cervical mucous abnormalities can also cause infertility. Abnormal cervical mucus can prevent sperm to reach the egg.
Abnormal sperm production or function due to varicocele, undescended testis or other genetic defects
Infection like chlamydia, gonorrhoea, mumps or HIV
Problems with delivery of sperms due to problems like premature ejaculation, cystic fibrosis etc
Exposure to pesticides, chemicals, radiation
Smoking, alcohol, drugs and certain medicines can also affect fertility
Frequent exposure to heat such as saunas, hot tubs can also hamper sperm production
Cancer and its treatment
Lack of exercise
So we can say that in the modern times, infertility is increasing as the various reasons for infertility are also increasing. Take treatment for infections on time and avoid chemicals and fast food as far as possible. If you feel difficulties with getting pregnant visit a doctor.