Repeated IVF Failure: Causes, Tests & Next Steps

Repeated IVF failure usually has a findable reason — embryo, uterus or timing. Here is what causes it, which tests matter, and how the next cycle can be planned differently.

What is repeated IVF failure?

Repeated IVF failure (also called recurrent implantation failure, or RIF) means good-quality embryos have been transferred several times without a pregnancy. Many specialists use a working definition of no pregnancy after about three embryo transfers, or after transferring around four good-quality embryos, in a woman under 40. ESHRE's 2023 guidance avoids a fixed number and describes RIF as failure often enough that further tests or a change of plan is justified.

It is emotionally exhausting, but it is not the end of the road. In most couples, a careful review finds something that can be adjusted.

Why does IVF fail repeatedly? The three main causes

Implantation needs three things to line up: a healthy embryo, a receptive uterus, and the right timing between them.

1. Embryo factors (the most common)

Chromosomal abnormalities — the single biggest reason embryos fail to implant. The chance of an abnormal embryo rises steadily with the woman's age, especially after 35.
Egg quality — linked to age, low ovarian reserve (AMH) and conditions such as endometriosis.
Sperm quality — high sperm DNA fragmentation can affect embryo development even when the semen count looks normal.

2. Uterine factors

Polyps, fibroids or a uterine septum that distort the cavity.
Intrauterine adhesions (Asherman's syndrome) after D&C or infection.
Thin endometrium — a lining that stays thin despite medication.
Chronic endometritis — a silent, low-grade infection of the lining that is treatable with antibiotics.
Hydrosalpinx — a blocked, fluid-filled fallopian tube that leaks fluid into the uterus and can roughly halve IVF success.
Adenomyosis — endometrial tissue inside the uterine muscle.

3. Other factors

Uncontrolled thyroid disease, diabetes or high prolactin.
Antiphospholipid syndrome (a blood-clotting condition).
Body weight, smoking and alcohol.
Lab and transfer technique — embryo culture conditions and a difficult transfer matter.

Which tests should you ask for after failed IVF?

Tests should be chosen for your history, not done all at once. Commonly useful ones are:

Hysteroscopy — a camera look inside the uterus to find and treat polyps, adhesions, septum or signs of endometritis.
3D ultrasound or saline sonography — to check uterine shape, fibroids, adenomyosis and hydrosalpinx.
Endometrial biopsy (CD138) — to diagnose chronic endometritis.
Karyotype of both partners — to rule out a balanced chromosomal translocation.
Sperm DNA fragmentation test.
Blood tests — thyroid (TSH), HbA1c, prolactin, vitamin D, and antiphospholipid antibodies where indicated.

Note: Tests such as the endometrial receptivity array (ERA) and immune testing are widely offered, but the evidence that they improve live birth rates is still limited. A good specialist will explain when they are — and are not — worth doing.

What can be done differently in the next cycle?

Treat what is found — remove polyps or septum, treat endometritis, and remove or clip a hydrosalpinx before the next transfer.
PGT-A (genetic testing of embryos) — can help select chromosomally normal embryos, particularly for older women or after multiple failures.
Change the stimulation protocol to improve egg yield and quality.
Blastocyst culture — growing embryos to day 5 for better selection.
Frozen embryo transfer with a carefully prepared lining.
ICSI or sperm selection when sperm factors are present.
Donor eggs or sperm — an option when egg or sperm quality is the clear limiting factor.
Lifestyle — healthy weight, no smoking, controlled blood sugar and thyroid.

How many IVF cycles should you try?

There is no single right number. Success depends heavily on the woman's age and embryo quality. Rather than repeating the same protocol, it is better to pause after two or three failed transfers, review everything, and plan the next cycle differently.

When to get a second opinion

Consider a second opinion if you have had two or more failed transfers with good embryos, if no one has examined the uterus with hysteroscopy, or if the plan has not changed between cycles. Our specialists at Iswarya Fertility review previous cycle records and design a personalised plan. You can also read about thin endometrium and the endometrial receptivity window.

This article is for general information and does not replace advice from your fertility specialist.

Frequently Asked Questions

What is considered repeated IVF failure?

It usually means no pregnancy after about three embryo transfers, or after transferring around four good-quality embryos, in a woman under 40. ESHRE's 2023 guidance does not fix a number and leaves it to clinical judgement.

What is the most common reason IVF fails repeatedly?

Chromosomal abnormalities in the embryo are the most common reason, and they become more frequent as a woman gets older. Uterine problems and sperm DNA damage are other common causes.

What tests should I do after failed IVF?

Commonly useful tests include hysteroscopy, a detailed ultrasound, an endometrial biopsy for chronic endometritis, karyotyping of both partners, sperm DNA fragmentation, and thyroid and blood sugar tests. Your specialist should choose them based on your history.

Can PGT-A help after repeated IVF failure?

PGT-A tests embryos for chromosomal abnormalities so a normal embryo can be chosen for transfer. It is most useful for older women or after several failures, but it does not suit everyone and should be discussed with your doctor.

Is it worth trying IVF again after 3 failures?

Yes, for many couples, provided the cause is investigated and the next cycle is planned differently. Repeating the same protocol without changes is less likely to succeed.