The causes of infertility can involve the female partner, the male partner, both partners, or sometimes remain unexplained even after evaluation. Infertility generally refers to difficulty achieving pregnancy after 12 months of regular unprotected intercourse. However, couples may need an earlier fertility assessment when the woman is 35 years or older or when either partner already has a condition that may affect fertility.
Understanding infertility causes is the first step towards choosing the right evaluation and treatment. Ovulation disorders blocked fallopian tubes, endometriosis, uterine conditions, sperm related concerns, age and certain lifestyle factors can all influence conception.
At Motherhood Fertility & IVF, fertility specialists assess both partners wherever appropriate instead of assuming that infertility is only a female concern.
What Are the Symptoms of Infertility?
The most obvious infertility symptom is difficulty achieving pregnancy despite regular unprotected intercourse.
Infertility itself may not cause noticeable symptoms. In many cases, the symptoms come from an underlying condition affecting reproductive health.
Some people may notice menstrual irregularities, pelvic pain, hormonal symptoms or sexual difficulties, while others may have no warning signs before a fertility evaluation.
What Are the Common Symptoms of Infertility in Women?
Possible symptoms of infertility in women can include:
- Irregular or absent periods
- Very painful periods
- Persistent pelvic pain
- Menstrual cycles that change considerably
- Symptoms associated with PCOS
- Symptoms associated with endometriosis
- Repeated difficulty conceiving
- A history of pregnancy loss
Women may also have reduced ovarian reserve without obvious symptoms. Symptoms of low ovarian reserve in women cannot confirm the condition on their own, which is why fertility specialists use medical history, ultrasound findings and appropriate ovarian reserve tests when indicated. Women who want more context around diminished reserve can also understand what low AMH levels may indicate when interpreted alongside age and other fertility findings.
What Are the Common Symptoms of Infertility in Men?
Men may also have no obvious symptoms.
Possible early signs of infertility in men can include:
- Erectile difficulties
- Ejaculation difficulties
- Reduced sexual function
- Testicular pain or swelling
- A previous testicular injury
- A history of certain testicular or groin surgeries
Sperm related concerns such as low sperm count, reduced motility or abnormal morphology usually require a semen analysis for assessment. Men who want to understand these findings in more detail can also read about male infertility causes, symptoms and treatment.
What Causes Infertility?
When couples ask what causes infertility, there is rarely one universal answer.
The causes of infertility can involve ovulation, egg quantity or quality, fallopian tubes, uterus, endometriosis, sperm production or sperm function. Age can also influence reproductive potential, particularly in women.
Sometimes both partners have contributing factors. In other cases, standard evaluation does not identify a clear explanation. This is known as unexplained infertility.
Understanding whether the issue is primarily female, male, combined or unexplained helps the fertility specialist recommend appropriate next steps.
Causes of Infertility in Women
Common female infertility causes include problems with ovulation, the fallopian tubes, ovarian reserve, endometriosis and certain uterine conditions.
Ovulation Disorders and PCOS
Ovulation disorders can make it difficult for an egg to be released regularly.
PCOS is one condition that can affect ovulation. Women with PCOS may have irregular cycles, infrequent periods or periods that stop for several months.
PCOS does not automatically mean permanent infertility. Many women with PCOS can conceive, although some may need lifestyle support, ovulation induction or other fertility care based on their individual evaluation.
Age and Ovarian Reserve
Female fertility generally declines with increasing age because both egg quantity and egg quality change over time.
Women searching for information about fertility issues after 30 in India should understand that fertility does not suddenly stop at a particular birthday. However, age becomes increasingly relevant when evaluating how long a couple has been trying, ovarian reserve and the appropriate timing of treatment.
For women asking what causes infertility in women after 35, age related changes in egg quantity and quality become an important part of the assessment, alongside other possible causes. The broader process of ovarian ageing can help explain why age and ovarian reserve are considered together during fertility planning.
Blocked or Damaged Fallopian Tubes
Healthy fallopian tubes allow sperm and egg to meet and help the developing embryo travel towards the uterus.
Tubal blockage or damage may interfere with this process. Previous pelvic infection, pelvic surgery or other reproductive conditions can contribute to tubal problems.
Women searching for infertility due to blocked fallopian tubes symptoms should know that tubal blockage can exist without obvious symptoms. A fertility evaluation may identify it through a tubal patency test. One option used in selected cases is Sonosalpingography, which can help assess the uterine cavity and fallopian tube patency using ultrasound based techniques.
Endometriosis
Endometriosis can affect fertility in some women by contributing to inflammation, adhesions or changes in pelvic anatomy.
If you are wondering does endometriosis affect chances of getting pregnant, the impact varies considerably. Some women with endometriosis conceive naturally, while others may require fertility treatment depending on age, disease severity, ovarian reserve and other fertility factors.
Women who want to understand this relationship more fully can read about endometriosis and infertility.
Uterine Conditions
Certain conditions affecting the uterine cavity or surrounding uterine muscle can influence fertility.
These may include:
- Fibroids
- Endometrial polyps
- Intrauterine adhesions
- Adenomyosis
- Some congenital uterine differences
Not every uterine abnormality causes infertility. Its location, size and effect on the uterine cavity matter when deciding whether treatment is necessary.
Read more about Uterine Fibroids and their possible impact on reproductive health.
Causes of Infertility in Men
Male factors form an important part of the overall infertility causes that fertility specialists evaluate.
Common concerns can include:
- Low sperm count
- Reduced sperm motility
- Abnormal sperm morphology
- Problems with sperm production
- Ejaculation difficulties
- Sexual dysfunction
- Certain hormonal conditions
- Testicular injury or previous surgery
- Varicocele in some men
A semen analysis forms an important part of male fertility evaluation, but one abnormal result should not automatically be interpreted as permanent infertility. Semen parameters can vary, and fertility specialists may recommend repeat assessment or additional tests depending on the findings. Men who have already received a report can also learn how to understand a semen analysis test report before discussing the result with a fertility specialist.
Lifestyle and Other Factors Affecting Fertility
Some lifestyle and environmental factors can influence reproductive health in both partners.
These may include:
- Smoking
- Excessive alcohol consumption
- Obesity
- Significant weight changes
- Exposure to certain reproductive toxins
- Excessive physical strain
- Poorly managed health conditions
Stress can affect wellbeing and may influence menstrual patterns or sexual health, but couples should not assume that stress alone explains persistent infertility. The relationship between stress and infertility is more complex than simply treating emotional stress as a direct cause.
When trying to address the causes of infertility, fertility specialists consider lifestyle alongside medical and reproductive factors.
How Is Infertility Diagnosed?
An infertility evaluation usually begins with the medical, menstrual, reproductive and sexual history of both partners.
The purpose of infertility tests is not simply to perform every available investigation. A fertility specialist selects tests based on age, symptoms, previous pregnancies, cycle pattern, duration of infertility and known medical concerns.
Evaluation commonly looks at three important areas:
- Whether ovulation is occurring
- Whether the female reproductive tract and fallopian tubes appear suitable for conception
- Whether semen parameters need further assessment
These findings help identify possible causes of infertility and guide treatment planning. Couples who want a broader overview can also review the complete guide to fertility tests and evaluations to understand why different investigations may be selected for different fertility concerns.
Diagnosis and Fertility Tests for Women
Depending on the clinical situation, female fertility tests may include:
- Transvaginal ultrasound
- Hormonal blood tests
- AMH test when ovarian reserve assessment is indicated
- Antral follicle assessment
- HSG or another appropriate tubal patency test
- Evaluation of the uterine cavity when required
Not every woman needs every test. The fertility specialist selects investigations based on the clinical history rather than using a single standard package.
Diagnosis and Fertility Tests for Men
A semen analysis usually provides the starting point for evaluating male fertility.
It examines parameters such as sperm concentration, movement and morphology.
If the result is abnormal or the medical history suggests another concern, the doctor may recommend repeat semen analysis, hormonal assessment, examination by an appropriate specialist or other targeted investigations.
Both partners should ideally undergo evaluation in parallel when appropriate.
What Treatments Are Available for Infertility?
Infertility treatment depends on the identified cause, the woman’s age, duration of infertility, previous treatment, ovarian reserve, semen findings and the couple’s reproductive goals.
There is no single treatment that suits every couple.
Some people may benefit from fertility focused lifestyle changes or treatment that supports ovulation. Others may need IUI, IVF or fertility related surgery.
Infertility Treatment for Women
Female fertility treatment may include:
- Ovulation induction when ovulation is irregular
- Monitoring of follicular development
- Treatment of selected uterine conditions
- Fertility related surgery when clinically appropriate
- IUI Treatment
- IVF Treatment
Women asking how to conceive with PCOS in India should avoid assuming that IVF is always the first step. Treatment depends on ovulation, age, semen findings, tubal health and whether another infertility factor is present.
Infertility Treatment for Men
Male infertility treatment depends on the reason for abnormal sperm production or function.
Management may involve addressing an underlying medical condition, reviewing lifestyle factors, treating selected varicoceles where clinically appropriate or using assisted reproductive treatment when required.
The fertility specialist may involve a male reproductive health specialist when the findings need additional evaluation. Male fertility services can include assessment of sperm related, hormonal, testicular and reproductive concerns when clinically appropriate.
What Happens After an Infertility Diagnosis?
After identifying a possible cause, the fertility specialist explains which options are appropriate and why.
Some couples can begin with simpler treatment, while others may need IVF because of significant tubal disease, severe sperm related concerns or another clinical indication.
The decision on when to start IVF treatment for infertility should come from the complete fertility assessment rather than from how long a couple has been trying alone.
Learn more about Infertility and the different factors that can affect conception.
Can Infertility Be Prevented?
Not every cause of infertility can be prevented. Age-related fertility changes, certain medical conditions and some anatomical problems cannot be avoided through lifestyle measures alone.
However, protecting reproductive health can still be valuable.
Tips to Support Fertility and Reproductive Health
- Avoid smoking.
- Limit excessive alcohol intake.
- Maintain a balanced diet.
- Stay physically active.
- Work towards a healthy weight where appropriate.
- Seek care for menstrual or reproductive health concerns.
- Do not delay evaluation when a known fertility risk is present.
Healthy habits can support general reproductive health, but they cannot guarantee conception or replace treatment for an established fertility condition. Couples who want practical lifestyle guidance can also explore natural ways to support fertility without treating lifestyle changes as a substitute for medical care.
When Should You Visit a Fertility Specialist?
Couples may consider fertility evaluation after 12 months of regular unprotected intercourse when the woman is younger than 35.
Women aged 35 years or older may benefit from evaluation after about six months of trying. Women over 40 may consider seeking medical advice sooner.
Do not wait for these timeframes when there is already a known concern such as very irregular periods, absent menstruation, suspected tubal disease, endometriosis, reduced ovarian reserve, sexual dysfunction or a known male fertility problem.
At Motherhood Fertility & IVF, fertility specialists evaluate both partners wherever appropriate and recommend treatment based on the cause rather than following the same pathway for every couple.
About the Author
Dr. Shruti N Mane holds an M.B.B.S, M.S in Obstetrics and Gynaecology and a PG Diploma in ART and Reproductive Medicine. Her clinical background supports the evaluation and management of reproductive health and fertility concerns.
Frequently Asked Questions
What are the common symptoms of infertility?
Common signs may include difficulty conceiving, irregular or absent periods, severe menstrual pain, persistent pelvic pain and sexual difficulties. Men may not have obvious symptoms even when semen parameters are affected. Symptoms alone cannot diagnose infertility, so persistent difficulty conceiving should be assessed through an appropriate fertility evaluation.
What causes infertility in couples?
What causes infertility differs between couples. The causes of infertility may involve ovulation disorders, age, blocked fallopian tubes, endometriosis, uterine conditions, reduced ovarian reserve or sperm related concerns. Both partners may contribute, while some couples receive a diagnosis of unexplained infertility after standard tests do not reveal a clear cause.
Can infertility affect both men and women?
Yes. Infertility causes can arise from the female partner, male partner, both partners or remain unexplained. A fertility assessment should therefore avoid placing responsibility on one partner before evaluation. Where appropriate, doctors assess ovulation and female reproductive anatomy alongside semen parameters so that both partners receive appropriate guidance.
Can irregular periods cause infertility?
Irregular periods do not automatically cause infertility, but they may indicate irregular or absent ovulation, which can make conception more difficult. Conditions such as PCOS, thyroid disorders and significant hormonal changes can affect cycle regularity. A fertility specialist can identify whether ovulation is occurring and decide whether treatment is required.
Can PCOS cause permanent infertility?
PCOS can interfere with regular ovulation, but it does not mean a woman will remain permanently infertile. Many women with PCOS conceive naturally or with appropriate fertility treatment. Treatment depends on age, ovulation pattern, metabolic health, semen findings and whether any additional fertility factor is present.
Can fibroids cause infertility?
Yes, some fibroids can affect fertility, but many do not. The impact depends largely on their size and location and whether they distort the uterine cavity or affect reproductive anatomy. A fertility specialist may use ultrasound or further assessment to determine whether a fibroid is likely to be relevant to difficulty conceiving.
Does endometriosis affect the chances of getting pregnant?
Endometriosis can affect fertility in some women, particularly when it causes significant pelvic adhesions or alters reproductive anatomy. However, its impact varies considerably. Age, ovarian reserve, severity of disease, tubal health, semen findings and previous treatment all influence the best fertility approach for someone with endometriosis.
Which tests are done to diagnose infertility?
Common fertility tests may include assessment of ovulation, ultrasound, ovarian reserve testing where appropriate, tubal patency testing and semen analysis. Doctors select tests according to the couple’s history rather than ordering every investigation routinely. Additional tests may be recommended when the initial evaluation identifies a specific concern.
If I have varicocele, am I infertile?
No. Having a varicocele does not automatically mean you are infertile. Many men with a varicocele can conceive. If fertility is a concern, a doctor may assess the varicocele together with semen parameters, medical history and examination. Treatment is considered only when the clinical findings indicate that it may be beneficial.
What is unexplained infertility treatment?
Unexplained infertility treatment is considered when standard fertility evaluation does not identify a clear cause. The approach depends on age, duration of infertility, previous pregnancies and other clinical factors. Options may include monitored treatment, IUI or IVF. A fertility specialist should personalise the sequence rather than automatically recommending the same treatment to every couple.
When should couples start IVF treatment for infertility?
IVF does not need to be the first treatment for every couple. Doctors may consider it sooner when significant tubal disease, severe male fertility concerns or other clinical indications are present. In other situations, couples may begin with simpler fertility treatment. The decision should follow a complete assessment of both partners.
When should couples see a fertility doctor?
Women younger than 35 may consider evaluation after 12 months of regular unprotected intercourse without pregnancy. Women aged 35 or older may consider evaluation after about six months, while women over 40 may seek advice sooner. Couples should also consult earlier when they already know of a condition that may affect fertility.
Speak With a Fertility Specialist
Identifying the underlying fertility concern can help couples understand their options and avoid unnecessary delays or unsuitable treatment.
If you are experiencing difficulty conceiving, irregular ovulation, sperm related concerns or another reproductive health condition, consult a fertility specialist at Motherhood Fertility & IVF for an individualised evaluation and treatment plan.
Call 080 6723 8900 or book an appointment with Motherhood Fertility & IVF.