Secondary Infertility: Difficulty Conceiving After a Previous Pregnancy

Secondary infertility is defined as the inability to conceive or carry a pregnancy to term after having previously had one or more children without assisted reproduction. It's more common than many people realise, studies suggest it accounts for roughly half of all infertility cases.

The definition typically applies after 12 months of trying to conceive for women under 35, or 6 months for women 35 and over. If you've been trying for this length of time, it may be worth seeking a fertility assessment.

Fertility can change over time for both women and men. Several factors may contribute to secondary infertility:

• Age, even a few years can make a difference, particularly for women over 35
• Changes in ovulation, conditions like ovulation disorders may develop after a first pregnancy
• Uterine conditions, scarring from a previous caesarean section, fibroids, or polyps
• Fallopian tube damage, from infection or previous surgery
• Endometriosis, which may progress over time
• Male factor changes, sperm quality can change and should be assessed with male fertility testing
• Weight changes, significant weight gain or loss can affect hormone levels and ovulation
• Lifestyle factors, increased stress, changes in diet, or new medications

Yes. Secondary infertility is actually quite common and affects a significant number of couples trying to expand their families. Many people assume that because they conceived before, they'll be able to do so again without difficulty. While this is often the case, it's not guaranteed.

The experience can feel isolating because it's less discussed than primary infertility, and well-meaning comments like "at least you have one" can add to the emotional burden. Your feelings about wanting another child are valid, and support is available.

The investigation process is similar to that for primary infertility and typically includes:

• Ovarian reserve testing (AMH blood test and antral follicle count)
• Hormone blood tests to assess ovulation
• Pelvic ultrasound to examine the uterus and ovaries
• Assessment of the fallopian tubes (such as HyCoSy or HSG)
• Semen analysis for the male partner
• Review of your medical history, including any complications from previous pregnancies

Your doctor will also consider what has changed since your last pregnancy, this can help identify potential causes more efficiently.

Yes, in most cases. Treatment depends on the underlying cause and may include:

• Ovulation induction, medication to stimulate egg development
• Intrauterine insemination (IUI), placing sperm directly into the uterus
• IVF, for more complex cases or when other treatments haven't worked
• Surgery, to remove fibroids, polyps, or scar tissue
• Lifestyle modifications, weight management, reducing stress, or addressing other health factors

Many couples with secondary infertility go on to have successful pregnancies with appropriate treatment.

Consider seeking help if:

• You're under 35 and have been trying for 12 months without success
• You're 35 or over and have been trying for 6 months
• You have irregular periods or known conditions like PCOS or endometriosis
• You had complications in your previous pregnancy that may affect fertility
• You're experiencing recurrent miscarriages

Early assessment doesn't commit you to treatment, it simply provides information to help you understand your options.

The emotional impact of secondary infertility is real and shouldn't be minimised. You may feel guilty about your feelings when you already have a child, or struggle with comments from others who don't understand. Some helpful strategies include:

• Acknowledging that your desire for another child is valid
• Speaking with a counsellor who specialises in fertility issues
• Connecting with others experiencing secondary infertility through support groups
• Being open with your partner about how you're both feeling
• Taking breaks from trying when you need them

Having a miscarriage after your first child can be part of the secondary infertility picture. While one miscarriage is common and often due to chromosomal abnormalities in the embryo, recurrent miscarriages (three or more) warrant investigation for underlying causes such as uterine abnormalities, hormonal issues, or clotting disorders.