The Role of Androgens in Reproductive Health: What You Need to Know

Androgens are a class of sex hormones derived from the 19-carbon androstane structure. Their primary function is to regulate sexual development and reproductive physiology.

Testosterone is the most widely recognized androgen, but others include dihydrotestosterone (DHT), androstenedione (A4), and dehydroepiandrosterone (DHEA). These hormones are vital because they act as molecular regulators across multiple body systems. They are produced in three main locations:

• The testes in males
• The ovaries in females
• The adrenal glands in both sexes

These production sites are the primary sources of androgens in women and men. Beyond reproduction, androgens contribute to metabolic regulation, cognitive development, and energy balance, reinforcing their central role in human health.

To understand the role of androgens in the body, it is important to look beyond visible sexual characteristics. In all individuals, androgens support several fundamental physiological processes:

• Bone Density: Androgens help maintain skeletal strength and reduce the risk of bone loss.
• Muscle Development: They regulate protein synthesis and muscle mass.
• Red Blood Cell Production: Androgens stimulate erythropoiesis, ensuring adequate oxygen delivery.
• Sexual Function: They influence libido and sexual performance.
• Puberty: Androgens initiate puberty and secondary sexual characteristics.

A crucial but often overlooked function is their role as estrogen precursors. Through aromatization, androgens such as testosterone are converted into estradiol, making them indispensable for reproductive and metabolic regulation in all genders.

The role of androgens in women is essential and complex. Although present in lower concentrations, androgens are critical for normal reproductive function.

A significant portion of testosterone produced in women is converted into estradiol, a key estrogen required for reproductive health. This hormonal pathway supports:

• Puberty and Development: Estradiol drives breast development and pelvic widening.
• Menstrual Regulation: Balanced androgen and estrogen levels help maintain regular cycles.
• Conception: Androgens and their estrogen derivatives support ovulation and implantation.
• Postmenopausal Health: Even after menopause, the ovaries continue to produce small amounts of androgens for several years, although adrenal production of precursors such as DHEA declines.

When androgen levels rise excessively, a condition known as hyperandrogenism, women may develop disorders such as polycystic ovary syndrome (PCOS). PCOS is the most common cause of elevated androgens and a leading contributor to infertility, highlighting the importance of balance in the role of androgens in females.

In men, androgens are the primary drivers of sexual maturation and reproductive capacity. During puberty, they cause deepening of the voice, growth spurts, and the development of facial, body, and genital hair.

From a fertility perspective, the most critical function is sperm production. Testosterone, in conjunction with follicle-stimulating hormone (FSH), is required for spermatogenesis in the testes. A specialized protein, androgen-binding protein (ABP), helps maintain high local testosterone concentrations, thereby ensuring continuous sperm production.

As men age, testosterone levels naturally decline, a process sometimes called andropause. This decline may result in reduced libido, erectile dysfunction, and decreased fertility, underscoring the lifelong significance of androgen balance.

Also Read – PCOS and Pregnancy: Risks, Complications, and Treatment Options

An increase of androgens, or hyperandrogenism, is most commonly discussed in women’s health. The leading cause is PCOS, but adrenal or ovarian tumors can also trigger excessive production in rare cases.

Hormonal shifts during menopause may create a relative increase of androgens, as estrogen levels drop more rapidly than androgen levels. This imbalance can cause symptoms such as thinning scalp hair or increased facial hair. In children, excess androgens may result in early puberty, while a deficiency can delay sexual development.

Understanding the mechanisms behind an increase in androgens is essential for accurate diagnosis and effective treatment.

The role of androgen in pregnancy is indirect but indispensable. Androgens serve as precursors for estrogens, particularly estradiol, which supports conception and maintains pregnancy. However, balance is critical.

Research, including animal models, shows that excessive androgen levels may contribute to metabolic dysfunction and are associated with PCOS, which can complicate both conception and pregnancy maintenance. This delicate equilibrium underscores the importance of hormonal regulation for reproductive success.

Androgens do not function in isolation. They interact closely with other hormones within the endocrine system.

Glucocorticoids such as cortisol often counteract androgen activity. Chronic stress can suppress testosterone production, impairing libido and spermatogenesis. Androgens also interact with insulin. Low testosterone levels in men are strongly linked to insulin resistance and metabolic syndrome.

Conversely, testosterone therapy has been shown to improve insulin sensitivity in some cases, partly due to its conversion into estradiol, a hormone that plays a central role in glucose metabolism.

Yes, hormonal balance is essential for fertility.

• In women: Elevated androgens can disrupt ovulation, cause missed periods, and lead to infertility.
• In men: Low androgen levels may reduce libido and cause erectile dysfunction. Importantly, external testosterone use can suppress natural sperm production by inhibiting FSH and LH secretion, paradoxically leading to infertility.

These effects clearly demonstrate how disruptions in the role of androgens can impair reproductive potential in both sexes.

Diagnosis typically involves blood testing. In women, clinicians often calculate the Free Androgen Index (FAI), which compares testosterone levels to sex hormone-binding globulin (SHBG).

In men, total testosterone levels are the primary diagnostic marker.

Treatment depends on the imbalance:

• High androgens: Management may include treating underlying conditions such as PCOS or using targeted hormonal therapies.
• Low androgens: Testosterone replacement therapy may be prescribed for men with a deficiency due to aging or metabolic disease, using gels, patches, or injections.

Also Read – 9 Factors Affecting Fertility in Men & Women

• Androgens are essential hormones that support the production of bone, muscle, and red blood cells in everyone.
• They are mandatory precursors for estrogen synthesis.
• In women, PCOS is the most common cause of elevated androgen levels and infertility.
• In men, testosterone is necessary for sperm production, but external supplementation can suppress fertility.
• Maintaining hormonal balance is central to reproductive and metabolic health.