Secondary infertility is the inability to conceive or carry a pregnancy after having previously conceived successfully. It affects approximately 1 in 10 couples. Common causes include maternal age-related decline, new conditions (fibroids, endometriosis, PCOS), changes in male fertility, and uterine scarring. The same investigations and treatments used for primary infertility apply.
Introduction
Secondary infertility — difficulty conceiving after a previous successful pregnancy — is one of the most emotionally complex fertility challenges. The grief of struggling to give your child a sibling, the confusion of not understanding why it is different this time, and the sense that others may not take your pain seriously because you already have a child: these are very real experiences. They are also surprisingly common. Approximately 1 in 10 couples who have had a child experience secondary infertility. You are not alone, and your struggle deserves the same quality of care as any fertility challenge. Visit the Fertility Solutions directory to find a specialist near you.
What Is Secondary Infertility?
Secondary infertility is defined as the inability to conceive or carry a pregnancy to term after having previously conceived — whether or not the previous pregnancy resulted in a live birth. This includes couples who conceived the first child naturally or with assisted reproduction.
Common Causes of Secondary Infertility
Maternal Age
The most significant single cause. Ovarian reserve and egg quality decline naturally with age — sometimes more rapidly than expected. A woman who conceived easily at 28 may have substantially lower reserve at 35. AMH testing and antral follicle count give a personalised picture. See our guides to trying to conceive at 40 and trying to conceive at 45 for age-specific guidance.
New Uterine Conditions
Fibroids, polyps, or intrauterine adhesions (Asherman’s syndrome) may have developed since the last pregnancy — particularly if a D&C was performed after a miscarriage or delivery. See trying to conceive with fibroids and uterine polyps and fertility for detail on these conditions.
Endometriosis or PCOS Developing or Worsening
Both conditions may have been absent or mild at the time of the first pregnancy and may have progressed. See trying to conceive with endometriosis and trying to conceive with PCOS.
Changes in Male Fertility
Male fertility is not static. Sperm quality can decline due to age, lifestyle changes, new health conditions, medications, or varicocele development. A new semen analysis is essential — the result from 3–5 years ago may not reflect current parameters. See low sperm count and fertility treatment.
Ovulation Changes
Thyroid dysfunction, hyperprolactinaemia, or new-onset PCOS can disrupt ovulation that was previously regular. A hormonal blood panel identifies these. See hormonal imbalances and fertility for a full explanation.
Weight Changes
Significant weight gain since the last pregnancy can impair ovulation through insulin resistance and hormonal disruption. See how weight affects fertility.
Previous Pregnancy Complications
Caesarean section, prolonged labour, or complicated delivery can occasionally cause uterine scarring (Asherman’s syndrome), cervical stenosis, or adenomyosis — all of which can affect subsequent fertility.
When to Seek Help
The standard guidance for secondary infertility is the same as primary infertility: seek assessment after 12 months of trying if under 35, or after 6 months if 35 or older. However, if you have a known condition (endometriosis, PCOS, previous miscarriage), earlier assessment is recommended. See how long should we try before seeking help on Fertility Solutions.
Investigations for Secondary Infertility
Investigations are the same as for primary infertility:
- AMH and antral follicle count (ovarian reserve)
- Day 2–3 hormonal blood panel (FSH, LH, oestradiol, prolactin, thyroid)
- Semen analysis for the male partner
- Pelvic ultrasound
• Uterine cavity assessment (saline sonohysterogram or hysteroscopy) — particularly important after any previous uterine surgery • HSG or HyCoSy for tubal assessment if indicated
Treatment
Treatment is directed at the identified cause. The same range of options available for primary infertility applies: ovulation induction, IUI, IVF with own eggs or donor eggs. The advantage in secondary infertility is that a previous successful pregnancy demonstrates the reproductive system’s capacity — which is positive information.
The Emotional Dimension
Secondary infertility carries its own specific grief — including complex feelings about the child you already have, about whether to share your struggle, and about navigating a world that may not recognise your pain as “real” infertility. If IVF cycles have failed, the specific grief of that experience is real and significant. See Failed Cycle: The Grief Nobody Prepares You For on Fertility Solutions for support.
Related Articles
- Secondary Infertility: Causes and Treatment
- Trying to Conceive with Fibroids
- Uterine Polyps and Fertility
- Hormonal Imbalances and Fertility
- Trying to Conceive at 40
- Low Sperm Count and Fertility
- How Long to Try Before Seeking Help
- Failed Cycle: The Grief Nobody Prepares You For
Frequently Asked Questions
Is secondary infertility real — or am I just being impatient?
Secondary infertility is a medically recognised condition affecting approximately 1 in 10 couples. It deserves the same investigation and support as primary infertility.
Can a c-section cause secondary infertility?
A caesarean scar can occasionally form an intracavitary lesion (c-section scar defect or niche) that impairs implantation or causes abnormal bleeding. This can be assessed hysteroscopically and treated.
Do I need to start fertility investigations from scratch?
Generally yes — your body has changed since the first pregnancy. A fresh semen analysis, AMH, and full hormonal and uterine assessment give the most accurate current picture.
Can my age alone explain secondary infertility?
Yes — age-related decline in ovarian reserve and egg quality is the most common cause of secondary infertility, particularly for women who had their first child before 30 and are now trying again at 35 or older.
Should my partner also be tested?
Yes, always. Male fertility changes over time. A current semen analysis is an essential part of the secondary infertility workup.
Can breastfeeding cause secondary infertility?
Prolonged breastfeeding can suppress ovulation through elevated prolactin. However, once breastfeeding stops and periods resume, this effect resolves. It is a temporary, not permanent, cause of infertility.
Does having a miscarriage between pregnancies affect my fertility?
A single uncomplicated miscarriage should not reduce fertility. However, surgical management of miscarriage (D&C) can occasionally cause intrauterine adhesions (Asherman’s syndrome). If you had a D&C and are now struggling, uterine cavity assessment is warranted.
Can secondary infertility be related to the previous delivery?
Yes — postpartum complications, infection, or scarring can occasionally cause secondary infertility. If delivery was complicated, share this history with your fertility specialist.
What are the treatment success rates for secondary infertility?
They are broadly similar to primary infertility rates, adjusted for age and cause. The prognostic advantage is a prior successful pregnancy demonstrating reproductive capacity.
Where can I get help for secondary infertility in South Africa?
Fertility Solutions connects couples with fertility specialists across South Africa who are experienced in secondary infertility investigation and treatment.
Key Takeaways
- Secondary infertility is common and deserves full investigation
- Age-related decline, new uterine conditions, and changed male fertility are the main causes
- Both partners need current investigations — previous results may be outdated
- Treatment options are the same as for primary infertility
- Emotional support is as important as medical investigation
Closing Thoughts
Your struggle is valid. Your desire to grow your family is completely understandable. And your situation — however confusing it feels — has answers and options. The most powerful step you can take is a thorough, up-to-date fertility assessment with a specialist who takes your history seriously. Find a fertility specialist near you through Fertility Solutions.
Disclaimer: This content is for educational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before making decisions about fertility treatment.
About the Author
Leigh-Ann Geydien is the founder of Fertility Solutions, South Africa’s only dedicated fertility directory. With a deep commitment to patient advocacy, she built the platform to bridge the gap between those navigating fertility challenges and the clinics and reproductive health specialists best placed to help them.
