Infertility can be a deeply emotional and often confusing experience for women and couples trying to conceive. When pregnancy doesn’t happen as expected, many questions arise: Why is this happening? Is something wrong? Where do we turn next? At Cary OB/GYN, we understand how challenging this journey can be. Our goal is to help you understand some of the common causes of infertility, what factors may be involved, and why seeking early evaluation is important.
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What Is Infertility?
Infertility is generally defined as the inability to achieve pregnancy after 12 months of regular, unprotected intercourse for women under age 35, or 6 months for women age 35 and older. Infertility affects approximately 10–15% of couples and can involve female factors, male factors, or a combination of both. Sometimes, no clear cause is immediately apparent—a situation known as unexplained infertility.
Understanding the possible causes can empower individuals and couples to make informed decisions and connect with the right care.
Female Factors Contributing to Infertility
While infertility can result from male, female, or blended factors, a significant proportion of cases involve issues related to the woman’s reproductive system. Here are some common female causes:
1. Ovulation Disorders
Ovulation is the process by which the ovaries release a mature egg each month. When ovulation is irregular or absent, pregnancy cannot occur. Common causes of ovulation disorders include:
- Polycystic Ovary Syndrome (PCOS) — A hormonal imbalance that interferes with regular ovulation. PCOS is one of the most common causes of female infertility.
- Premature Ovarian Insufficiency (POI) — Also known as premature menopause, this occurs when the ovaries stop functioning normally before age 40.
- Hormonal Imbalances — Thyroid disorders, elevated prolactin levels, or other endocrine disruptions can also affect ovulation.
Symptoms of an ovulation disorder may include irregular periods, skipped cycles, or very light or heavy bleeding.
2. Tubal Factors and Blocked Fallopian Tubes
The fallopian tubes transport the egg from the ovary to the uterus. If the tubes are blocked or damaged, sperm cannot reach the egg, and fertilization cannot occur.
Common causes of tubal factor infertility include:
- Prior pelvic infections, such as sexually transmitted infections (STIs) like chlamydia or gonorrhea
- Endometriosis, which can cause scar tissue and adhesions
- Previous abdominal or pelvic surgery, which may create adhesions
A hysterosalpingogram (HSG) or other imaging tests can help evaluate the patency of the fallopian tubes.
3. Endometriosis
Endometriosis is a condition where tissue similar to the uterine lining grows outside the uterus. This tissue can implant on the ovaries, fallopian tubes, and pelvic lining, causing inflammation, scar tissue, and adhesions.
Endometriosis may interfere with:
- Ovulation
- Fallopian tube function
- Fertilization
- Implantation
Symptoms of endometriosis include painful periods, pain during intercourse, pelvic pain, or heavy bleeding, but some women have no symptoms at all.
4. Uterine or Cervical Abnormalities
Structural issues within the uterus or cervix can impact the ability to conceive and sustain a pregnancy. These may include:
- Uterine fibroids — Non-cancerous growths that can distort the uterine cavity
- Uterine polyps — Benign growths of the endometrial tissue
- Congenital uterine anomalies — Variations in uterine shape or structure
- Cervical factors — Issues with cervical mucus that may hinder sperm movement
These conditions can often be diagnosed through imaging tests like ultrasound or hysteroscopy.
5. Age-Related Infertility
Age is one of the most significant factors in female fertility. As women age, both the quantity and quality of eggs decline, particularly after age 35. This natural decline means:
- Ovulation becomes less predictable
- Risk of chromosomal abnormalities increases
- Time to conception may lengthen
Women over age 35 who have been trying to conceive for 6 months without success are encouraged to seek evaluation sooner.
Male Factors Contributing to Infertility
Infertility is not solely a female issue. Male factors contribute to approximately 40–50% of infertility cases. Common male causes include:
1. Sperm Production Problems
Problems with sperm production or quality can reduce the likelihood of fertilizing an egg. These may include:
- Low sperm count
- Poor sperm motility (movement)
- Abnormal sperm morphology (shape)
Semen analysis is a key diagnostic test to evaluate sperm health.
2. Varicocele
A varicocele is an enlargement of the veins within the scrotum that can raise testicular temperature and negatively impact sperm production. Varicoceles are a common reversible cause of male infertility and may be surgically corrected.
3. Hormonal Imbalances and Medical Conditions
Sperm production and function are regulated by hormones. Conditions affecting the pituitary gland, thyroid, or testosterone levels can disrupt normal sperm development. Chronic illnesses, medications, and lifestyle factors may also influence fertility.
Combined and Unexplained Infertility
In many cases, infertility may be due to a combination of male and female factors. For others, standard testing may not identify a specific cause—this is referred to as unexplained infertility. Even in these instances, couples can often achieve pregnancy with targeted interventions and support.
Diagnostic Evaluation: Finding the Underlying Cause
When a couple is unable to conceive after a period of trying, a comprehensive fertility evaluation may be recommended. This typically includes:
- Medical history and physical exam
- Ovulation testing
- Blood work for hormone levels
- Ultrasound imaging
- Hysterosalpingogram (HSG) to assess fallopian tubes
- Semen analysis for the male partner
Accurate diagnosis sets the foundation for a personalized treatment plan.
Treatment Approaches for Infertility
Once underlying factors are identified, treatment options may include:
- Lifestyle modifications (nutrition, exercise, stress management)
- Ovulation induction medications
- Surgical interventions for tubal or uterine issues
- Assisted reproductive technologies (ART) such as intrauterine insemination (IUI) or in-vitro fertilization (IVF)
- Male factor treatments, including varicocele repair or assisted sperm techniques
Modern fertility care offers a range of options tailored to individual circumstances.
Emotional and Supportive Care
Infertility is not just a physical challenge—it can also be emotionally demanding. Feelings of frustration, grief, or anxiety are common. At Cary OB/GYN, we encourage open communication and holistic support, including:
- Counseling or support groups
- Stress-reduction strategies
- Partner involvement and shared decision-making
Fertility challenges are deeply personal, and compassionate care remains a cornerstone of successful support.
When to Seek Help
You may consider seeking an evaluation if:
- You have been trying to conceive for 12 months (under age 35)
- You have been trying to conceive for 6 months (age 35 or older)
- You have known reproductive or medical conditions
- You experience irregular periods or ovulatory issues
- You have a history of pelvic infections or surgeries
- You have a partner with abnormal semen analysis results
Early evaluation can identify contributing factors and expand treatment options.
“Dr. Wycoff is a phenomenal doctor who cares about her patients. She makes the annual exam less intimidating and fearful. She has been a great listener and advocate when I have needed to address physical issues.”
Moving Forward: Hope and Support
Infertility can feel overwhelming, but understanding the potential causes and treatment pathways can help restore a sense of direction and hope. Progress in reproductive medicine, combined with personalized care, supports many women and couples in achieving pregnancy.
At Cary OB/GYN, we are committed to guiding patients through evaluation, education, and treatment with empathy, expertise, and individualized care. If you have questions about fertility or are ready to take the next step, we encourage you to reach out for a comprehensive evaluation and supportive consultation.