Male and Female Infertility Causes & Risk Factors Explained

In the US, 10-15% of couples face infertility due to male or female factors. Male infertility often stems from varicocele, hormonal imbalances, or genetic disorders, while female infertility is commonly linked to PCOS, age-related ovarian decline, and fallopian tube issues. Lifestyle factors like obesity, smoking, and alcohol use affect both genders.

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Key Takeaways

Common Male Infertility Causes: Varicocele, Hormonal Issues & Genetic Factors

Varicocele (enlarged testicular veins) disrupts sperm quality, while hormonal disorders like hyperprolactinemia or pituitary tumors reduce sperm production. Genetic conditions such as Klinefelter’s syndrome also contribute to male infertility. Sperm analysis is critical for diagnosis.

Female Infertility: PCOS as Leading Cause and Age Impact on Fertility

Polycystic ovary syndrome (PCOS) causes irregular ovulation in 70% of female infertility cases. Women over 40 experience a 50% decline in fertility due to reduced egg quality and quantity. Tests like AMH and antral follicle count help assess ovarian reserve.

Lifestyle Risk Factors Affecting Both Genders: Smoking, Obesity Effects on Fertility

Smoking reduces sperm motility in men and increases anovulation in women. Obesity (BMI >30) lowers fertility in both sexes by disrupting hormone balance. Men over 40 have 20% lower fertility compared to younger counterparts due to declining sperm DNA integrity.

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