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25 Most Common Causes Of Infertility



Infertility is a problemthat increasingly more couples are facing,about one in five coupleshaving difficulty inconceiving a child. Infertility isdefined asinability toconceivea childafter one year ofunprotected intercourseand its causes can be related to both men and womenhealth aspects.Primary infertilityis defined as no previous pregnancyin patient history and secondary infertility implies the existence of at least one pregnancy. The term sterility is different from infertility and is used whenan effective therapy that can deal with the cause ofinfertilityis not available.

The two partners equally sharethe conception failure causes:

  • Female factor 30-40%
  • Male factor 30-40%
  • Combinedfactor15 to 20%
  • Idiopathic (no known cause) 2-15%

Approximately 70% of couples treated for infertility willconceive.

The Most Common Causes Of Infertility

The infertility causes can be very varied, based on independent or associated conditions, belonging to one or both partners.Some causes of infertility can not be detected orunknown disorders interact with this aspect of conception.

Causes of infertility

For women:

  • Pelvic infectionsthat interfere withthe sexual organs, the most commoneffects being the formation of ductal clamps thataffect the ductal tractor blockageof the fallopian tubes (constriction).
  • Endometriosis, a condition represented by the presence of uterine tissueoutside the uterus(eg fallopian tube) – a situation more common in womenaged over30 who are nulliparous (without any pregnancy in history).
  • Ovarian Disease (ovarian cysts, polycystic ovarian syndrome, ovarian dystrophy, ovarian cancer) that lead to impossibility of formingof anormal egg, healthy, which can be fertilized.
  • Congenital anomalies of the sexual organs (“T” shaped uterus)
  • Diseases of the fallopian tubes,adnexitis (infection that reachesthe ovary), congenital disorders, narrowfallopian tubes that do not allow the egg to reach the uterus, thatare scared due to an infection with the same consequences on egg migration, which areunable to absorb the egg, or fallopian tubes which do not ensure the egg viability.
  • Diseases of the uterus: congenital, structural disorders,womb infections, diseases of the cervixthat do not allow penetration or migrationof sperm, uterine fibroids, etc.
  • Sexual dysfunctionduring intercourse (dyspareunia– pain during intercourse – or vaginismus), vaginitis, trichomoniasis etc.
  • Menstrual cycle disorders: amenorrhea (lack of menstruation) or irregular menstruation
  • Organic lesionsof the central nervous system
  • Hormonal disorderssuch as hyperprolactinemia
  • Body weight – obesity seems to interfere with reproductive function
  • Some chronic diseases.

For men:

  • Somesexual dysfunctions(impotence, premature ejaculation or delayed ejaculation)
  • Dysfunction in sperm production (quantity, mobility, structure, maturation).
  • Varicose veins in the scrotum
  • Infections of the reproductive organs
  • Hormones dysfunction caused by mumps or drug use
  • Certain chronic diseases that can cause reproductive disorders: tuberculosis, diabetes, etc
  • Testicular diseases that causetheir inflammation (orchitis), cysts, varicocele;
  • Environmental factors: heat (eg. occupational exposure)
  • Excessive smoking, more than two packs a day lowers sperm count and motility
  • Toxic byproducts: lead, boric acid, ultrasound.

Men and womancommon causes of infertility

See also: Couple's Infertility Management And Treatment