If you have been trying to conceive without success, you may be wondering whether something is affecting your fertility. Female infertility can have several causes, ranging from problems with ovulation and hormonal imbalances to blocked fallopian tubes and conditions affecting the uterus. In some cases, the cause is not immediately clear.
The good news is that many fertility problems can be evaluated and treated. Understanding the possible causes, recognising symptoms that deserve attention, and knowing which tests may be recommended can help you take the next step with confidence.
What is female infertility?
Female infertility refers to difficulty becoming pregnant due to factors affecting the female reproductive system. Clinically, infertility is generally defined as not achieving pregnancy after 12 months of regular, unprotected sexual intercourse. However, you may need an evaluation sooner depending on your age, medical history, and other risk factors.
Fertility depends on several processes working together. The ovaries need to release an egg, at least one fallopian tube needs to allow the egg and sperm to meet, fertilisation must occur, and the resulting embryo needs to implant in the uterus.
A problem at any stage can make conception more difficult. Infertility can also involve male factors, so assessing both partners is an important part of the evaluation.
What are the common causes of female infertility?
There is no single cause of female infertility. The most common causes involve ovulation, the fallopian tubes, the uterus, or age-related changes in reproductive function.
1. Ovulation disorders
Ovulation is the process in which an ovary releases an egg during the menstrual cycle. If ovulation happens irregularly or does not occur, it can become difficult to conceive.
One common condition associated with ovulation problems is polycystic ovary syndrome (PCOS). Other possible causes include thyroid disorders, elevated prolactin levels in certain circumstances, and conditions affecting the hormones that regulate the ovaries.
Women with ovulation disorders may experience:
- Irregular menstrual periods or periods that are several months apart.
- Absent periods.
- Unpredictable menstrual cycles.
- Acne or increased facial and body hair, which can occur with hormonal conditions such as PCOS.
Some women with ovulation disorders have few noticeable symptoms. Irregular periods can be an important clue, but a medical assessment is needed to establish the cause.
2. Age-related decline in fertility
Age is one of the most important factors affecting female fertility. As women get older, both the number of eggs remaining in the ovaries and the proportion of eggs capable of developing into a healthy embryo decline.
Fertility generally begins to decrease during the early 30s, with a more pronounced decline later in the decade and into the 40s.
Age-related fertility changes do not necessarily cause obvious symptoms. Menstrual periods may remain regular even as the number and quality of eggs decline.
If you are planning a pregnancy later in life, discussing your reproductive goals and fertility assessment with a gynecologist can help you understand your options.
3. Blocked or damaged fallopian tubes
The fallopian tubes connect the ovaries to the uterus. They provide the pathway through which an egg travels and where fertilisation usually takes place.
If one or both tubes are blocked or damaged, sperm may not be able to reach the egg, or the fertilised egg may have difficulty travelling towards the uterus.
Possible causes include:
- Previous pelvic inflammatory disease (PID).
- Certain sexually transmitted infections, including chlamydia.
- Previous ectopic pregnancy.
- Endometriosis.
- Previous pelvic or abdominal surgery that caused scarring.
Blocked fallopian tubes do not always produce noticeable symptoms. Some women discover the problem only when they undergo fertility testing. Pelvic pain, unusual vaginal discharge, or a history of pelvic infection may provide additional clues.
4. Endometriosis
Endometriosis occurs when tissue similar to the lining of the uterus grows outside it, often around the ovaries, fallopian tubes, or other pelvic structures.
The condition may contribute to infertility by causing inflammation, scar tissue, adhesions, or changes affecting the ovaries and fallopian tubes.
Possible symptoms include:
- Painful menstrual periods.
- Persistent pelvic pain.
- Pain during or after sexual intercourse.
- Pain during bowel movements or urination, particularly around menstruation.
- Difficulty becoming pregnant.
However, some women with endometriosis experience few or no symptoms. The severity of pain also does not always reflect how much the condition affects fertility.
5. Uterine fibroids and other uterine abnormalities
The uterus is where an embryo implants and develops during pregnancy. Conditions that change the shape of the uterine cavity may sometimes interfere with implantation or increase the risk of pregnancy complications.
Uterine fibroids are non-cancerous growths that develop in or around the uterus. Their effect on fertility depends largely on their size and location. Fibroids that distort the uterine cavity are generally of greater concern than those that do not.
Other possible problems include endometrial polyps, adhesions inside the uterus, and certain congenital differences in uterine shape.
Symptoms may include:
- Heavy or prolonged menstrual bleeding.
- Pelvic pressure or discomfort.
- Painful periods.
- Difficulty conceiving or a history of pregnancy loss.
Not every fibroid or uterine abnormality requires treatment. Your doctor will consider its location, symptoms, reproductive plans, and likely effect on pregnancy before recommending a procedure.
6. Diminished ovarian reserve and premature ovarian insufficiency
Ovarian reserve refers to the remaining supply of eggs in the ovaries. This reserve naturally declines with age, but it can be lower than expected in some younger women.
Premature ovarian insufficiency (POI) occurs when the ovaries lose normal function before the age of 40. It may affect ovulation and hormone production, although ovarian activity can sometimes occur intermittently.
Possible signs of POI include:
- Irregular or absent menstrual periods.
- Hot flushes or night sweats.
- Vaginal dryness.
- Difficulty conceiving.
Some women with diminished ovarian reserve have regular periods and no obvious symptoms. Blood tests and ultrasound findings may help assess ovarian function, but no single test can determine with certainty whether a woman will conceive naturally.
7. Hormonal and other medical conditions
Several medical conditions can affect the hormones involved in ovulation and reproduction.
For example, an underactive or overactive thyroid can interfere with menstrual function. Elevated prolactin may also disrupt ovulation in some women. Other conditions affecting the pituitary gland or the hypothalamus, which help regulate reproductive hormones, may contribute to fertility problems.
Depending on the underlying condition, symptoms may include irregular periods, unexpected milk-like breast discharge when not breastfeeding, unexplained changes in weight, fatigue, or changes in body hair.
These symptoms are not specific to infertility, so appropriate testing is needed rather than assuming a hormonal problem is the cause.
8. Lifestyle and unexplained infertility
Smoking, being significantly underweight or overweight, and excessive exercise can affect reproductive function in some women. Certain medical treatments, including chemotherapy, may also affect ovarian function.
Lifestyle factors are only part of the picture, however. Infertility should not automatically be attributed to stress or personal habits.
Sometimes, standard investigations do not identify a clear reason for difficulty conceiving. This is known as unexplained infertility. It does not mean that the problem is imaginary; it means that available tests have not identified a specific cause.
What tests are used to diagnose female infertility?
There is no single test that can diagnose every cause of infertility. Your gynecologist will recommend investigations based on your age, menstrual history, symptoms, previous pregnancies, medical conditions, and how long you have been trying to conceive.
Common tests include:
1. Medical history and physical examination
Your doctor may ask about your menstrual cycle, previous pregnancies, pelvic pain, previous infections or surgeries, medications, and family history.
A physical examination may be recommended depending on your symptoms and medical history. This initial assessment helps determine which investigations are most appropriate.
2. Blood tests for hormones
Blood tests may be used to investigate suspected ovulation problems or other hormonal conditions.
Depending on your circumstances, these may include:
- Progesterone: A test timed appropriately within your menstrual cycle can help determine whether ovulation has occurred.
- Thyroid function tests: These may be recommended when thyroid disease is suspected.
- Prolactin: This is generally tested when symptoms or clinical findings suggest elevated prolactin.
- FSH and estradiol: These may help assess ovarian function in selected situations.
- Anti-Müllerian hormone (AMH): This can help estimate ovarian reserve and predict the likely response to fertility medication.
AMH should not be interpreted as a definitive fertility test. A low result does not mean pregnancy is impossible, and a normal or high result does not guarantee conception.
3. Pelvic ultrasound
A pelvic ultrasound, often performed transvaginally when appropriate, allows your doctor to examine the uterus and ovaries.
It may help identify fibroids, ovarian cysts, features associated with PCOS, and other structural abnormalities. An antral follicle count may also be used as part of an ovarian reserve assessment.
Ultrasound findings are interpreted alongside your medical history and other test results.
4. Hysterosalpingography (HSG)
HSG is an X-ray procedure used to examine the uterine cavity and determine whether the fallopian tubes are open.
A contrast dye is introduced through the cervix, and X-ray images show how it moves through the uterus and tubes. This test is commonly used when tubal blockage is suspected.
Some women experience temporary cramping during the procedure. Your doctor will explain how to prepare for the test and whether it is suitable for you.
5. Further investigations when needed
Additional tests may be recommended if the initial assessment suggests a specific problem.
For example, hysteroscopy allows a doctor to examine the inside of the uterus using a thin camera. Laparoscopy may be considered in selected cases, such as when endometriosis or significant pelvic adhesions are suspected.
These procedures are not necessary for every woman. Testing should be guided by clinical findings rather than performing every available investigation.
6. Assessment of the male partner
Fertility difficulties can arise from either partner or from a combination of factors. A semen analysis evaluates sperm concentration, movement, and shape, among other characteristics.
Assessing both partners early can help avoid unnecessary delays and ensure that the recommended treatment addresses the relevant causes.
What treatment options are available for female infertility?
Treatment depends on the underlying cause, your age, how long you have been trying to conceive, and your personal preferences. Some women conceive with relatively simple interventions, while others may benefit from assisted reproductive treatments.
1. Medication to support ovulation
If you are not ovulating regularly, your doctor may recommend medication to encourage the release of an egg.
For women with PCOS-related anovulatory infertility, letrozole is commonly recommended as a first-line ovulation-induction medication when there are no other major infertility factors. Other medicines may be appropriate depending on the diagnosis.
Treatment requires medical supervision, as some medications can increase the risk of multiple pregnancy or ovarian complications.
2. Treatment of underlying medical conditions
If a thyroid disorder, elevated prolactin, or another medical condition is contributing to fertility problems, treating that condition may improve reproductive function.
The appropriate treatment depends on the specific diagnosis. Hormonal medicines should not be started without medical advice, as unnecessary treatment may cause harm or delay the correct diagnosis.
3. Surgery for selected conditions
Surgery may be considered when a structural problem is likely to affect fertility.
Examples include removing certain uterine polyps or fibroids that distort the uterine cavity, treating adhesions inside the uterus, or managing selected cases of endometriosis.
Surgery is not the best option for every patient. Your doctor will weigh its potential benefits against its risks, recovery time, and possible effects on future fertility.
4. Intrauterine insemination (IUI)
IUI involves placing prepared sperm directly into the uterus around the time of ovulation. Fertilisation still takes place inside the body.
IUI may be suitable in selected cases, including some couples with unexplained infertility or mild sperm-related difficulties. Its suitability depends on factors such as the condition of the fallopian tubes, ovulation, and sperm quality.
IUI is generally less invasive than IVF, but it is not appropriate for every cause of infertility.
5. In vitro fertilisation (IVF)
IVF involves stimulating the ovaries to produce eggs, collecting those eggs, fertilising them in a laboratory, and transferring an embryo into the uterus.
It may be recommended when the fallopian tubes are blocked or severely damaged, when other treatments have not succeeded, or when age and other clinical factors make IVF a more appropriate option.
In some cases, intracytoplasmic sperm injection (ICSI), in which a single sperm is injected directly into an egg, may be used as part of IVF.
IVF can offer an effective treatment option, but success varies according to age, egg and embryo factors, the cause of infertility, and the clinic's treatment approach. It does not guarantee pregnancy.
6. Lifestyle changes and preconception care
Supporting your general health can help prepare your body for pregnancy, although lifestyle changes cannot correct every underlying fertility problem.
Helpful steps may include:
- Maintaining a balanced diet and a weight appropriate for your health.
- Avoiding smoking and recreational drugs.
- Limiting excessive exercise if it is affecting your menstrual cycle.
- Taking folic acid before pregnancy, as advised by your healthcare professional.
- Reviewing medicines and existing medical conditions before trying to conceive.
These steps are supportive measures, not a substitute for fertility investigations when they are needed.
When should you see a fertility specialist?
Consider arranging a fertility assessment if:
- You are under 35 and have been trying to conceive for 12 months without success.
- You are aged 35–40 and have been trying for 6 months without success.
- You are over 40 and wish to become pregnant, in which case an early consultation is advisable.
- You have irregular or absent periods.
- You experience severe period pain or persistent pelvic pain.
- You have a history of endometriosis, pelvic inflammatory disease, ectopic pregnancy, or treatment that may affect ovarian function.
- You have known uterine, tubal, or hormonal problems.
You do not need to wait for the usual time limits if you already know that a medical condition may affect your fertility.
Frequently asked questions
Can female infertility occur even if periods are regular?
Yes. Regular periods often suggest that ovulation is occurring, but they do not rule out problems involving the fallopian tubes, uterus, ovarian reserve, or other factors.
Does PCOS always cause infertility?
No. PCOS can interfere with ovulation, but many women with PCOS conceive naturally or with appropriate treatment. The treatment plan depends on whether ovulation is occurring and whether other fertility factors are present.
Can blocked fallopian tubes be treated?
Sometimes. Treatment depends on where the blockage is located, how severe it is, and whether other fertility factors are present. Options may include selected surgical procedures or IVF.
Does a low AMH level mean I cannot get pregnant?
No. AMH helps estimate ovarian reserve and can help predict the response to ovarian stimulation. It does not independently determine whether you can conceive naturally or predict your individual chance of pregnancy.
Can infertility be treated without IVF?
Yes, depending on the cause. Some women benefit from ovulation-induction medication, treatment of an underlying condition, or surgery for selected structural problems. Others may need IUI or IVF. The best option depends on your individual assessment.
Is female infertility always caused by a problem in the woman?
No. Difficulty conceiving can be related to female factors, male factors, a combination of both, or unexplained infertility. Evaluating both partners is important.
Does stress cause infertility?
Stress can affect emotional well-being, relationships, and sometimes behaviours or menstrual function. However, infertility should not simply be blamed on stress. If you are struggling to conceive, a medical assessment can help identify or rule out treatable causes.
Take the next step
Difficulty conceiving can be emotionally challenging, especially when the reason is unclear. However, you do not have to navigate the process alone. Identifying the possible cause of infertility is the first step towards choosing a treatment that suits your health, age, and family-planning goals.
If you have been trying to conceive without success, or have symptoms that concern you, a consultation with Dr. Sumbal Afzal can help you understand which tests may be appropriate and what treatment options are available. You can book an appointment at the clinic in Lahore or arrange an online video consultation.