Infertility

Overview

Infertility generally refers to difficulty achieving pregnancy after a sustained period of regular, unprotected intercourse, or an inability to carry a pregnancy to live birth. In clinical practice, it is commonly defined as failure to conceive after 12 months for women under 35, and after 6 months for women 35 and older, reflecting the age-related decline in fertility. Infertility can affect people of all genders and may involve female factors, male factors, combined factors, or remain unexplained despite evaluation. It is a common global health issue with medical, emotional, social, and economic dimensions.

From a public health perspective, infertility is more prevalent than many people realize. The World Health Organization has described infertility as a disease of the male or female reproductive system, and global estimates suggest that a substantial proportion of couples experience infertility at some point during their reproductive years. Causes are diverse and can include ovulatory disorders, diminished ovarian reserve, endometriosis, tubal disease, uterine abnormalities, sperm abnormalities, hormonal conditions, genetic factors, age-related changes, environmental exposures, and certain chronic illnesses. In some cases, no clear cause is identified, leading to a diagnosis of unexplained infertility.

The significance of infertility extends beyond reproduction itself. Research consistently shows that infertility may be associated with significant psychological distress, relationship strain, stigma, and reduced quality of life. Cultural expectations around family building can intensify this burden. At the same time, infertility may sometimes serve as a marker of broader health concerns, such as polycystic ovary syndrome (PCOS), thyroid disease, metabolic dysfunction, sexually transmitted infections affecting the reproductive tract, or testicular and endocrine disorders.

Because infertility has many possible contributors, evaluation is typically multifactorial and may involve assessment of ovulation, ovarian reserve, menstrual history, pelvic anatomy, semen parameters, endocrine function, and relevant medical history. Both conventional and traditional systems of medicine often frame infertility as a whole-person condition influenced by reproductive function, systemic health, stress, sleep, nutrition, and environment. Across models of care, balanced counseling and individualized evaluation are considered important, and consultation with qualified healthcare professionals is appropriate when fertility concerns arise.