Overview of causes and classification of infertility

Infertility is the result of a combination of factors, which can be divided intoFemale factors (40%-50%), male factors (30%-40%) and mutual or unknown reasons (20%-30%).The main causes for women include ovulation disorders, fallopian tube blockage, endometriosis, etc.; for men, the main causes are oligoasthenozoospermia, sexual dysfunction, etc.In addition, lifestyle, environmental factors and genetic diseases may also cause infertility.The following content will be organized by cause classification, focusing on analyzing common clinical causes and corresponding medical intervention methods.

1. Main causes of female infertility

The core problems of female infertility are mostly related to structural or functional abnormalities of the reproductive system.Ovulation disorder(such as polycystic ovary syndrome, thyroid dysfunction) accounts for 25%-30%, manifesting as irregular menstruation or no ovulation;fallopian tube problems(Such as inflammation, adhesion) may lead to obstruction of sperm-egg binding;endometriosisIt reduces the chance of pregnancy by affecting the ovarian and uterine environment.In addition, uterine malformations and insufficient luteal function can also interfere with embryo implantation.In clinical practice, the cause needs to be determined through hormone testing, ultrasound or hystero-laparoscopy.

2. Key factors of male infertility

Male infertility is mainly caused byDisorders of sperm production or transport.Semen abnormalities (oligospermia, asthenozoospermia, teratozoospermia) account for more than 90%, which may be related to orchitis, varicocele or hormone imbalance;sexual dysfunction(such as difficulty in erection) or blockage of the vas deferens can also prevent natural conception.Some cases are related to genetics (such as Klinefelter syndrome) or environmental exposure (radiation, high temperature).Semen analysis is the primary diagnostic method and should be combined with genetic testing if necessary.

3. Other influencing factors and common causes

In addition to physiological factors,bad lifestyle(smoking, alcoholism, obesity),psychological stressand exposure to toxic substances (such as pesticides) may reduce fertility.About 10%-20% of couples existimmune infertility(such as anti-sperm antibodies), or genetic compatibility issues between both parties.Unexplained infertility needs to be diagnosed through elimination methods, which may involve hidden factors such as egg quality and embryo development potential.

Summary and scientific response

Infertility requires a systematic assessment of the health status of both parties, and targeted treatment such asOvulation induction drugs (clomiphene), in vitro fertilization (IVF) or surgical repairWait.Improving your lifestyle and controlling underlying diseases (such as diabetes) can increase your natural pregnancy rate.It is recommended to choose a regular reproductive medicine center for treatment and avoid blind use of medication.With the development of assisted reproductive technology, most patients can realize their fertility wishes through scientific intervention.

Quote sources:

1. World Health Organization (WHO) "Guidelines for the Diagnosis and Treatment of Infertility" 2021 Edition
2. American Society for Reproductive Medicine (ASRM) "Infertility Evaluation Criteria"
3. "Consensus on Diagnosis and Treatment of Infertility in China" by the Reproductive Medicine Branch of the Chinese Medical Association