Female Infertility

Female Infertility


What is Female Infertility?

Female infertility is generally defined as the inability to conceive after:

  • 12 months of regular unprotected intercourse in women under 35
  • 6 months of regular unprotected intercourse in women aged 35 and over


It may also include difficulty maintaining a pregnancy, such as recurrent miscarriage.


For pregnancy to occur naturally, several steps must happen:

  • A healthy egg must develop and be released from the ovary (ovulation)
  • The egg must travel through the fallopian tube
  • Sperm must fertilise the egg
  • The fertilised egg must implant into the lining of the uterus


If any of these processes are disrupted, infertility can result.


Impact of Female Infertility on Anatomy and Health

Female infertility can involve several parts of the reproductive system:

  • Ovaries: Problems with ovulation mean eggs are not released regularly
  • Fallopian tubes: Blockages prevent the egg and sperm from meeting
  • Uterus: Structural abnormalities or lining issues may prevent implantation
  • Hormonal system: The brain (pituitary gland and hypothalamus) controls ovarian function through hormones


Beyond reproductive anatomy, infertility may be linked to broader health concerns such as thyroid disease, autoimmune conditions, polycystic ovarian syndrome (PCOS), or metabolic disorders.


Emotionally, infertility can also significantly affect well-being, relationships, and mental health. Support and counselling are often important components of care.


Risk Factors for Female Infertility

Certain factors increase the likelihood of fertility difficulties:

  • Age over 35: Egg number and quality decline significantly after 35
  • Irregular or absent periods: May indicate ovulation problems
  • Polycystic ovarian syndrome (PCOS)
  • Endometriosis or adenomyosis
  • Previous pelvic infections (pelvic inflammatory disease)
  • History of ectopic pregnancy or tubal surgery
  • Previous chemotherapy or radiation therapy
  • Smoking or excessive alcohol use
  • Obesity or being significantly underweight


By age 40, natural fertility is significantly reduced, and the risk of miscarriage increases due to declining egg quality.


Causes of Female Infertility

Female infertility can result from one or more of the following:


Ovulation Disorders

Problems with ovulation are among the most common causes. Without ovulation, no egg is available for fertilisation.


Causes include:

  • Hormonal imbalances
  • PCOS
  • Thyroid disorders
  • High prolactin levels
  • Premature ovarian insufficiency
  • Severe stress, excessive exercise, or rapid weight changes


Signs may include irregular periods, very light or heavy cycles, or no periods at all.


Age-Related Decline

As women age:

  • The number of eggs decreases
  • Egg quality declines
  • Chromosomal abnormalities increase


Egg quality often begins declining years before menopause.


Fallopian Tube Damage

Blocked or damaged tubes prevent the egg from meeting sperm.


Common causes:

  • Pelvic inflammatory disease
  • Endometriosis
  • Previous abdominal or pelvic surgery
  • Past ectopic pregnancy


Uterine Conditions

  • Fibroids
  • Uterine polyps
  • Congenital uterine abnormalities
  • Adenomyosis
  • Scar tissue inside the uterus


These may interfere with implantation or maintenance of pregnancy.


Endometriosis

Endometriosis occurs when tissue similar to the lining of the uterus grows outside the uterus. It can:

  • Distort pelvic anatomy
  • Cause inflammation
  • Affect egg quality
  • Block the fallopian tubes


Lifestyle Factors

  • Smoking
  • Excess alcohol
  • Poor nutrition
  • High stress
  • Extreme athletic training


These can disrupt hormonal balance and ovulation.


Symptoms of Female Infertility

In many cases, infertility may be the only symptom. However, other signs can include:

  • Irregular menstrual cycles
  • No periods (amenorrhoea)
  • Painful periods
  • Heavy or very light bleeding
  • Pelvic pain
  • Pain during intercourse
  • Recurrent miscarriage


Tracking ovulation may help identify problems. Simple ovulation observation methods include:

  • Basal body temperature charting
  • Monitoring cervical mucus changes
  • Ovulation predictor urine tests
  • Blood hormone testing


Preventing Female Infertility

Not all causes of infertility are preventable. However, steps to support fertility include:

  • Maintaining a healthy body weight
  • Avoiding smoking and recreational drugs
  • Limiting alcohol intake
  • Managing stress
  • Treating infections promptly
  • Seeking early medical advice if cycles are irregular


Women planning pregnancy may also benefit from preconception counselling.


Types of Female Infertility

Female infertility may be classified as:

  • Primary infertility: No previous pregnancies
  • Secondary infertility: Difficulty conceiving after a previous pregnancy
  • Ovulatory infertility: Due to ovulation problems
  • Tubal infertility: Due to blocked or damaged fallopian tubes
  • Uterine infertility: Due to structural abnormalities
  • Unexplained infertility: When no clear cause is found after investigation


Stages of Female Infertility

Fertility decline can be viewed progressively:

  • Early reproductive years: Highest fertility
  • Mid-30s: Noticeable decline in egg quality
  • Late 30s to early 40s: Accelerated decline
  • Perimenopause: Ovulation becomes irregular
  • Menopause: Ovulation permanently stops


Diagnosis of Female Infertility

A comprehensive fertility assessment may include:

  • Detailed medical history and cycle review
  • Physical examination
  • Blood tests: Hormone levels (FSH, LH, AMH, thyroid, prolactin)
  • Ovulation testing
  • Ultrasound scan: To assess the ovaries and uterus
  • Tubal ultrasound: To check fallopian tube patency
  • Laparoscopy: In selected cases, to assess endometriosis or adhesions, and test fallopian tubes


Both partners are usually assessed simultaneously.


Treatment for Female Infertility

Treatment depends on the underlying cause and may include:

  • Lifestyle modification
  • Ovulation induction medications
  • Hormonal therapy
  • Surgical treatment for fibroids or endometriosis
  • Assisted reproductive technologies (ART) such as:
  • Intrauterine insemination (IUI)
  • In vitro fertilisation (IVF)
  • Intracytoplasmic sperm injection (ICSI)
  • Egg freezing (for fertility preservation)
  • Donor eggs in cases of severe ovarian insufficiency


Early diagnosis improves treatment options and outcomes.


What if Female Infertility is Not Addressed?

If infertility is not addressed:

  • Natural fertility may continue to decline with age
  • Emotional distress may increase
  • Underlying medical conditions may remain untreated
  • Treatment success rates may decrease over time


Seeking medical advice early, particularly after age 35, can significantly improve chances of achieving pregnancy.


What To Do Next?

If you are concerned about any of the symptoms above or are having difficulties with fertility, talk with your general practitioner.
This will help clarify what to do next and whether a referral to our practice is the next step.