What is the most common cause of infertility in women?

P.CHO-2019

Obstetrics & Gynaecology

Easy

Appeared in: P.CHO-2019

Explanation

Polycystic Ovary Syndrome (PCOS) is the most frequent cause of anovulatory infertility, and ovulatory disorders are the leading cause of female infertility overall.
The condition is characterized by hormonal imbalances, including hyperandrogenism (high androgen levels) and often insulin resistance, which disrupt the normal process of follicular maturation and oocyte (egg) release.
Without regular ovulation, the opportunity for fertilization is absent or significantly reduced, directly leading to infertility.

Option A: While endometriosis is a significant and common cause of infertility, it is less prevalent than ovulatory disorders like PCOS. It causes infertility through inflammation, anatomical distortion, and adhesions.
Option C: Cervical cancer itself is not a common cause of infertility. Rather, the treatments for cervical cancer, such as hysterectomy (removal of the uterus), radiation, or certain types of chemotherapy, can lead to infertility.
Option D: Sexually Transmitted Diseases (STDs) like Chlamydia and Gonorrhea can cause Pelvic Inflammatory Disease (PID), which is a major cause of tubal factor infertility due to scarring and blockage. However, ovulatory dysfunction remains the most common overall category of female infertility.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of female infertility as background academic context rather than a clinical decision trigger.
Nurses play a key role in educating patients with PCOS about lifestyle modifications. A weight loss of just 5-10% can significantly improve hormonal balance and restore ovulation in overweight individuals.
It is crucial for nurses to screen women with PCOS for comorbidities such as type 2 diabetes, hypertension, and dyslipidemia, as the condition is strongly linked to insulin resistance and metabolic syndrome.
Patient counseling should include information on ovulation tracking methods and the timing of intercourse to maximize the chances of conception.

How to Approach the Question

Identify the core of the question, which asks for the 'most common' cause of female infertility among the given options.
Recall the main categories of female infertility: ovulatory disorders, tubal factors, uterine/cervical factors, and endometriosis.
Evaluate each option within this framework. PCOS is the classic example of an ovulatory disorder. Endometriosis affects pelvic anatomy and inflammation. STDs primarily cause tubal damage. Cervical cancer is a malignancy, with infertility being a consequence of its treatment.
Access your knowledge about the relative prevalence of these categories. Ovulatory dysfunction is the most frequent reason for female infertility.
Conclude that PCOS, as the leading cause of ovulatory dysfunction, is the most common single cause of female infertility.

Concept Tested & Keywords

QlrHviKMBW7V9cKqlM-kxp

E6 Physiology Guyton 4SAE Part 3 p. 52-54

E6 Medicine Harrison 22e Part 2 p. 1053-1055