Why Am I Not Getting Pregnant? 7 Common Reasons, Fertility Tests and When to Seek Help Mon , May 11

Trying to conceive but not getting pregnant? Difficulty conceiving can be related to irregular ovulation, age-related fertility changes, sperm health, blocked fallopian tubes or other reproductive conditions. Understanding the possible causes and getting the right fertility assessment can help you and your partner decide on the next steps.

Pregnancy depends on several stages, including ovulation, sperm reaching the egg, fertilisation, embryo development and implantation. A problem at any stage may affect conception. Even if you have regular periods or your partner releases sperm normally, pregnancy may not occur. A fertility assessment can help identify possible causes in both partners.

Difficulty conceiving can involve one or more reproductive factors. The following are seven common reasons.

1. Irregular Ovulation

Ovulation is the release of an egg from the ovary. If ovulation happens irregularly or does not occur, the chances of conception may be reduced.

PCOS, thyroid disorders and elevated prolactin levels can affect ovulation.

Possible signs include:

• Irregular or missed periods
• Unpredictable menstrual cycles
• Difficulty identifying the fertile window

A specialist may recommend hormone tests and ultrasound assessment to understand whether ovulation is occurring.

2. Age-Related Fertility Changes

Female fertility gradually changes with age. As women get older, the number of available eggs decreases, and the likelihood of chromosomal abnormalities in eggs increases.

An AMH test can provide information about ovarian reserve, but it does not directly measure egg quality or guarantee whether natural pregnancy is possible.

If you are planning pregnancy later in life, a fertility specialist can discuss appropriate tests and fertility planning options.

3. Male-Factor Infertility

Difficulty getting pregnant is not always related to the woman’s reproductive health. Male-factor infertility can also affect conception.

Possible causes include:

• Low sperm concentration
• Reduced sperm motility
• Abnormal sperm morphology
• Hormonal conditions
• Certain testicular or reproductive health problems

A semen analysis is commonly recommended to assess sperm concentration, movement, shape and semen volume. Abnormal results may require repeat testing or further evaluation.

4. Blocked or Damaged Fallopian Tubes

The fallopian tubes carry the egg towards the uterus and are usually where fertilisation takes place.

Blocked or damaged tubes may prevent sperm and egg from meeting. Possible causes include previous pelvic infections, endometriosis and pelvic surgery.

A test called hysterosalpingography (HSG) may help assess whether the fallopian tubes appear open.

5. Uterine Conditions and Endometriosis

Certain conditions affecting the uterus and surrounding reproductive organs may make conception more difficult.

These include:

• Uterine fibroids, depending on their size and location
• Endometrial polyps
• Adenomyosis
• Endometriosis
• Certain structural abnormalities of the uterus

Endometriosis occurs when tissue similar to the uterine lining grows outside the uterus. It may be associated with painful periods, pelvic pain and difficulty conceiving.

Ultrasound and other investigations may be recommended based on symptoms and medical history. A normal ultrasound does not rule out every form of endometriosis.

6. Hormonal and Medical Conditions

Hormones regulate egg development, ovulation and the menstrual cycle. Certain conditions can interfere with these processes.

Examples include:

PCOS: May affect ovulation and cause irregular periods.

Thyroid disorders: Can influence menstrual regularity and reproductive health.

Elevated prolactin: May interfere with normal ovulation.

Diabetes and other metabolic conditions: May affect reproductive health and pregnancy planning.

A fertility specialist may recommend blood tests based on your symptoms and medical history.

7. Lifestyle and General Health Factors

Certain lifestyle factors can influence reproductive health in both partners.

These include:

• Smoking and tobacco use
• Excessive alcohol consumption
• Significant weight changes
• Being underweight or having obesity
• Poorly controlled medical conditions
• Certain medications and environmental exposures

Maintaining a balanced diet, regular physical activity, adequate sleep and a healthy weight can support general health and pregnancy planning.

Sperm release during intercourse does not necessarily mean fertilisation has occurred. For pregnancy to happen, sperm must travel through the female reproductive tract and meet an egg at the right time.

The process involves several stages:

• The ovary releases an egg through ovulation.
• Sperm travel through the cervix and uterus.
• A sperm reaches and fertilises the egg.
• The fertilised egg develops into an embryo.
• The embryo travels towards the uterus and implants in the uterine lining.

A problem at any of these stages may prevent pregnancy. For example, blocked fallopian tubes may prevent sperm and egg from meeting, while sperm-related factors may affect fertilisation.

This is why regular intercourse, sperm release or regular periods alone cannot confirm that conception has taken place. Both partners may need fertility assessment.

Ovulation and fertilisation are two different stages of reproduction.

After ovulation, the egg generally remains capable of fertilisation for around 12–24 hours. Sperm can survive in the female reproductive tract for up to about five days under favourable conditions.

This means intercourse during the days before ovulation can also result in pregnancy.

Yes. Regular ovulation does not guarantee pregnancy. Conception also depends on sperm health, fallopian tube function, fertilisation, embryo development and implantation.

For example, a woman may release an egg every month but still experience difficulty conceiving because of a tubal problem or male-factor infertility.

A fertility evaluation usually begins with a medical history and assessment of both partners. The specialist considers age, menstrual cycle patterns, previous pregnancies, medical conditions and how long the couple has been trying to conceive.

The tests recommended depend on individual findings.

1. AMH Test: Assessing Ovarian Reserve

The Anti-Müllerian Hormone (AMH) test helps estimate ovarian reserve by measuring a hormone produced by small developing follicles in the ovaries.

How specialists interpret it:

Lower AMH: May suggest reduced ovarian reserve, but natural pregnancy may still be possible.

Higher AMH: May be seen in women with PCOS, but AMH alone cannot diagnose the condition.

AMH within the laboratory reference range: Provides information about ovarian reserve but does not guarantee fertility.

AMH does not directly measure egg quality or independently predict natural conception. Specialists interpret it alongside age, ultrasound findings and other clinical factors.

2. Pelvic Ultrasound: Examining the Uterus and Ovaries

A pelvic or transvaginal ultrasound helps assess the uterus, ovaries and surrounding structures.

It may identify:

• Antral follicles in the ovaries
• Ovarian cysts and features associated with PCOS
• Uterine fibroids and endometrial polyps
• The thickness and appearance of the uterine lining
• Certain structural abnormalities

A normal ultrasound does not exclude every fertility problem, including blocked fallopian tubes or some forms of endometriosis.

3. Hormone Tests: Evaluating Reproductive Function

Depending on menstrual history and clinical findings, a specialist may recommend:

FSH and estradiol: Often measured early in the menstrual cycle to help assess ovarian function.

TSH: Checks thyroid function, which can affect menstrual regularity.

Prolactin: May be recommended when irregular or absent periods suggest elevated prolactin.

Progesterone: When measured at the appropriate time before the expected next period, it can help establish whether ovulation has occurred.

These results are interpreted according to cycle timing, age and other clinical findings.

4. Semen Analysis: Assessing Male Fertility

A semen analysis evaluates important sperm characteristics:

Concentration: Number of sperm in a given volume.

Motility: How effectively sperm move.

Morphology: The proportion of sperm with a typical shape.

Semen volume: Amount of semen produced.

Results are compared with laboratory reference limits. An abnormal result does not automatically mean natural conception is impossible, and a normal result does not guarantee pregnancy.

Semen parameters can vary, so repeat testing or further assessment may be recommended.

5. HSG Test: Checking the Fallopian Tubes

Hysterosalpingography (HSG) is an imaging test that uses contrast dye and X-rays to assess the uterine cavity and whether the fallopian tubes appear open.

• Dye passing through both tubes: Suggests that the tubes are open.
• No dye passage: May indicate a blockage, although temporary tubal spasm or technical factors can affect the result.
• Abnormal uterine cavity appearance: May require further investigation.

If a blockage is suspected, the specialist considers the patient’s history and may recommend additional assessment.

No single fertility test can explain every case of difficulty conceiving.

For example, a woman may have regular periods and an AMH result within the laboratory reference range but still experience difficulty conceiving because of a tubal problem or male-factor infertility.

Specialists consider the combined findings to assess ovulation, ovarian reserve, sperm health, tubal function and the uterus before recommending treatment.

Unexplained infertility is diagnosed when a couple has difficulty conceiving despite a standard fertility evaluation showing no clear cause.

This generally means that ovulation appears to be occurring, at least one fallopian tube appears open, no significant uterine abnormality has been identified, and semen analysis has not revealed a clear male-factor problem.

It does not mean there is no biological reason. It means routine investigations have not identified a specific explanation.

Some stages of reproduction cannot be fully assessed through routine investigations.

Possible factors include:

Egg quality: Ovarian reserve tests do not directly measure the quality of individual eggs.

Sperm function: Routine semen analysis does not assess every aspect of sperm function.

Fertilisation: Standard tests cannot always establish whether an egg and sperm successfully combine inside the body.

Embryo development: Routine investigations cannot fully predict whether an embryo will develop normally.

Implantation: Tests cannot reliably identify every factor affecting an embryo’s ability to implant.

Treatment depends on the woman’s age, duration of trying to conceive, previous pregnancies and investigation results.

A specialist may discuss:

Expectant management: Continuing to try naturally for a suitable period.

Ovulation stimulation: Medication to support egg development, with appropriate monitoring.

Intrauterine insemination (IUI): Placing prepared sperm into the uterus around ovulation in selected cases.

In vitro fertilisation (IVF): Fertilising eggs with sperm in a laboratory and transferring an embryo into the uterus when appropriate.

Not every couple with unexplained infertility needs IVF immediately. Treatment should be selected according to individual circumstances.

No. IVF is not the first or only treatment for every couple experiencing difficulty conceiving.

Depending on the cause, age, ovarian reserve, sperm health and fallopian tube condition, treatment may include:

• Lifestyle and medical management
• Medication to support ovulation
• Surgery for selected reproductive conditions
• Intrauterine insemination (IUI)
• In vitro fertilisation (IVF)

A fertility specialist can explain the suitable options, including their potential benefits, limitations and risks.

Egg freezing, also known as oocyte cryopreservation, involves collecting and freezing a woman’s eggs for possible future use.

It may be considered by women who wish to delay pregnancy or are preparing for certain medical treatments that may affect fertility.

Egg freezing does not guarantee a future pregnancy. Age at freezing, the number and quality of eggs collected and future treatment factors influence the likelihood of success.

A fertility specialist can help determine whether fertility preservation is appropriate.

Consider a fertility consultation if:

• Under 35: You have been trying to conceive for 12 months without pregnancy.
• 35–39: You have been trying for 6 months without pregnancy.
• 40 or older: You are planning pregnancy and need an individual fertility assessment.
• Your periods are irregular or absent.
• You have a history of PCOS, endometriosis, pelvic infections or reproductive surgery.
• You or your partner have a known reproductive health concern.
• You have experienced recurrent pregnancy loss.

Do not wait for these timeframes if you already have a known fertility concern. Early assessment can help identify possible causes and guide appropriate care.

If you have been trying to get pregnant without success, it is natural to feel worried or frustrated.

Difficulty getting pregnant can happen for many reasons, including irregular ovulation, hormonal imbalance, age-related fertility changes, stress or sperm health issues. In many cases, fertility problems are treatable once the cause is identified.

Medically reviewed by fertility specialists at MGM Healthcare.

Dr. A Jaishree Gajaraj

Head of Obstetrics and Gynaecology

Department: Obstetrics & Gynaecology

Book an Appointment

Difficulty getting pregnant can have several possible causes. Understanding the underlying factors is an important step towards appropriate care.

At MGM Healthcare, Chennai, the Obstetrics and Gynaecology team can assess fertility concerns, recommend relevant investigations and discuss suitable treatment options based on individual needs.

If you have been trying to conceive without success, consult a specialist to understand your reproductive health and plan your next steps.

Book an Appointment at MGM Healthcare, Chennai.

Difficulty getting pregnant can feel frustrating and emotionally overwhelming, but many couples experience delays in conception for different reasons.

Understanding possible causes and seeking timely medical guidance can help provide clarity, reassurance and the right fertility support moving forward.

If pregnancy occurs after fertility treatment or conception planning, understanding early pregnancy symptoms may also help you feel more prepared.