Causes of infertility

The causes of infertility may originate in the man (30%), in the woman (30%) or in both. In some cases, it may not be possible to explain the cause.

80% of female sterility cases are due mainly to these causes:

  • Advanced age: from the age of 35 onwards reproductive potential drops, and after 40 years of age the possibility of pregnancy is less than 10%.
  • Tubo-peritoneal Factor: when the Fallopian Tubes have any kind of lesion.
  • Endometriosis: when uterine tissue is found outside the uterus.
  • Other risk factors: myomas; sexually transmitted diseases; chronic diseases such as diabetes, cancer, thyroid disease, asthma or depression; taking medication such as antidepressants.

In terms of men, the main causes of male infertility are:

  • Genital tract disorders which prevent semen from being deposited at the back of the vagina during coitus.
  • Erection problems.
  • Alterations in semen production (a decrease in the quantity and quality of semen).
  • Abnormal location of the urinary meatus; very pronounced curvatures of the penis or a significant decrease in its size.
  • Extreme obesity.

Causes of Infertility

  • 30% masculine causes: alterations in the testicular area, obstruction of tubes, prostate pathologies, problems with ejaculation or erectile function, or alterations in the semen.
  • 30% feminine causes: early menopause, endometriosis, obstructions or lesions in the Fallopian tubes, uterine or cervical anomalies, or ovulation problems.
  • 20% mixed or combined causes: in which both parties are responsible.
  • 20% due to unexplained causes, when it has not been possible to identify the problem.