Pregnancy After Uterine Artery Embolization for Adenomyosis Success Risks and Fertility Insights

Adenomyosis can create a painful conflict between symptom relief and fertility planning. Heavy bleeding, severe cramps, anaemia, pelvic pain, and infertility may push a woman towards treatment, yet many standard options either suppress ovulation or remove the uterus. That is why pregnancy after uterine artery embolisation for adenomyosis draws so much attention.

Uterine artery embolisation, often called UAE, is a minimally invasive procedure that blocks selected blood vessels feeding abnormal uterine tissue. It is better known for treating fibroids, but it is also used in some cases of adenomyosis. For women who still want to conceive, the central question is not only whether UAE can reduce symptoms. The more difficult question is whether the uterus can safely support a future pregnancy.

A systematic review of pregnancy outcomes after UAE for adenomyosis gives useful, but cautious, answers. Pregnancies have been reported. Live births have been reported. At the same time, the evidence base remains limited, mixed, and highly dependent on patient selection.

This article is for general medical information only. It should not replace advice from a gynaecologist, fertility specialist, or interventional radiologist who can assess an individual case.

Pregnancy planning after adenomyosis treatment needs careful counselling.

What UAE does in adenomyosis

Adenomyosis happens when endometrial-like tissue grows within the muscle wall of the uterus. This can make the uterus enlarged, tender, and less able to contract normally. It may also affect implantation and early pregnancy through inflammation, altered uterine movement, and changes in the junctional zone, the area between the endometrium and myometrium.

UTERINE ARTERY EMBOLIZATION works by reducing blood flow to the affected uterine tissue. During the procedure, a specialist usually passes a thin catheter through an artery in the groin or wrist and guides it to the uterine arteries. Tiny particles are then released to block selected vessels.

The goal in adenomyosis is to shrink or quieten the abnormal tissue enough to reduce bleeding and pain. Unlike hysterectomy, UAE preserves the uterus. That preservation is one reason it is discussed in patients who want future pregnancies.

Still, preserving the uterus does not automatically mean preserving fertility. Fertility depends on several factors:

• Age and ovarian reserve

• Severity and pattern of adenomyosis

• Presence of fibroids, endometriosis, or tubal disease

• Semen parameters in the partner

• Previous pregnancy history

• Whether assisted reproduction is needed

• Extent of embolisation and uterine recovery after treatment

  
  

This makes pregnancy outcomes hard to interpret. A pregnancy after UAE may reflect good patient selection as much as the effect of the procedure.

What the systematic review found about pregnancy success

The main message from the systematic review is cautiously encouraging: pregnancy after UAE for adenomyosis is possible, including pregnancies that end in live birth. Yet the review does not support a simple promise that UAE improves fertility for every patient.

Across the included studies, pregnancy rates varied widely. Some women conceived naturally, while others conceived through assisted reproductive techniques such as in vitro fertilisation. Successful live births were reported, but so were miscarriages and obstetric complications. The studies differed in design, follow-up period, adenomyosis severity, and whether patients also had fibroids or other fertility problems.

That means there is no single pregnancy success rate that applies to all women after UAE for adenomyosis. The reported rates from small studies and case series can look promising, especially in carefully selected patients, but they should not be read as a guaranteed outcome.

A fair reading is this:

UAE may allow pregnancy in selected women with adenomyosis, but current evidence is not strong enough to treat it as a standard fertility-enhancing procedure.

The distinction matters. A treatment can preserve the uterus and reduce symptoms without reliably improving the chance of conception. In some cases, symptom relief may make pregnancy attempts more realistic. In other cases, the underlying fertility barriers may remain.

Pregnancy may occur naturally or with fertility treatment

The review included pregnancies that occurred without fertility treatment and pregnancies following assisted reproduction. This is clinically relevant because adenomyosis often overlaps with infertility, endometriosis, and previous failed embryo transfers.

For a woman planning IVF, UAE may be considered when adenomyosis is severe, symptoms are significant, and other treatments have not worked or are unsuitable. The aim may be to improve the uterine environment before embryo transfer. Yet evidence for this approach is still developing.

For natural conception, the key issue is time. Women in their late 30s or early 40s may not be able to wait long after UAE before trying to conceive. Since ovarian reserve declines with age, delaying fertility treatment for several months can affect the overall chance of pregnancy.

Imaging helps define the type and severity of adenomyosis before treatment.

Risks and complications reported after UAE

UAE is less invasive than open surgery, but it is still a vascular procedure with short-term and long-term risks. The systematic review highlights the need to separate general procedural risks from pregnancy-related risks.

Short-term risks after the procedure

Many patients experience post-embolisation symptoms. These can include pelvic pain, cramping, nausea, low-grade fever, and fatigue. They often settle with medicines and monitoring, but severe pain or infection needs urgent care.

Possible complications include:

• Infection of the uterus or pelvis

• Vaginal discharge due to tissue breakdown

• Temporary or persistent menstrual changes

• Non-target embolisation, where particles affect tissue not meant to be treated

• Need for hospital readmission

• Rare need for emergency surgery

  
  

Most serious complications are uncommon, but they matter more in patients trying to preserve fertility.

Effects on ovarian reserve

One major concern is ovarian function. The uterine and ovarian blood supplies can communicate through small vessels. If embolic material affects ovarian circulation, ovarian reserve may decline. This risk appears higher with increasing age and reduced baseline ovarian reserve.

Before UAE, fertility planning should include tests such as anti-Müllerian hormone, antral follicle count, and a careful menstrual history. These do not predict pregnancy with certainty, but they help estimate how much time and ovarian reserve may be available.

Pregnancy-related risks

Pregnancies after UAE need closer obstetric follow-up. Reported concerns include miscarriage, preterm birth, abnormal placentation, fetal growth restriction, malpresentation, postpartum haemorrhage, and caesarean delivery. Not every pregnancy faces these problems, and adenomyosis itself can increase obstetric risk even without UAE.

The hard question is causation. If a complication occurs after UAE, it may be linked to the procedure, the adenomyosis, maternal age, IVF, previous uterine surgery, or a combination of these factors. The current evidence cannot fully separate these influences.

Even so, the possibility of placental and uterine blood-flow issues means that pregnancy after UAE should be treated as higher risk until proven otherwise.

Why the evidence remains limited

Systematic reviews are only as strong as the studies they include. In this area, the available studies tend to be small, observational, and varied. Many do not include a control group of similar women who did not undergo UAE. Some combine patients with adenomyosis and fibroids, which makes it difficult to know which condition influenced the result.

Other limitations include:

• Different definitions of adenomyosis

• Mixed imaging methods, such as ultrasound and MRI

• Different embolic materials and techniques

• Inconsistent reporting of fertility intent

• Unclear number of women actively trying to conceive

• Short or uneven follow-up

• Limited detail on miscarriage, live birth, and neonatal outcomes

  
  

This does not make the findings useless. It means the findings should guide counselling, not replace individual assessment.

A woman who becomes pregnant after UAE is an important success story. A series of such pregnancies shows that pregnancy can happen. But clinical decisions need more than possibility. They need an honest estimate of benefit, risk, and alternatives.

Minimally invasive treatment still requires specialist planning and follow-up.

Who may be a suitable candidate

UAE may be discussed when adenomyosis causes significant symptoms and the patient wants to avoid hysterectomy. It may also be considered when medicines fail, side effects are unacceptable, or surgery carries high risk.

For women who want future pregnancy, suitability depends on a careful balance. A stronger case may exist when:

• Symptoms are severe and affecting quality of life

• Adenomyosis is well documented on imaging

• Other fertility factors have been assessed

• The woman understands that fertility outcomes are uncertain

• The procedure is performed by an experienced interventional radiologist

• There is a plan for post-procedure fertility care

  
  

By contrast, UAE may be less suitable when ovarian reserve is already very low, pregnancy needs to be attempted urgently, infection risk is high, or the adenomyosis pattern suggests limited benefit.

Age is especially important. A 32-year-old with good ovarian reserve and severe bleeding may face a different risk-benefit equation than a 41-year-old preparing for IVF. The uterus may need time to recover after UAE, but fertility may not allow long delays.

What to discuss before choosing UAE

A decision about UAE before pregnancy should involve both symptom goals and reproductive goals. Ideally, counselling includes a gynaecologist, fertility specialist, interventional radiologist, and, when needed, a high-risk obstetrician.

Key questions include:

• Is adenomyosis the main cause of symptoms or infertility?

• Is the disease diffuse or focal?

• Are fibroids also present?

• What does MRI show about uterine wall involvement?

• How good is ovarian reserve?

• Is natural conception realistic?

• Would IVF be needed?

• How long should pregnancy be delayed after the procedure?

• What monitoring will be needed during pregnancy?

• What alternatives are available?

  
  

The timing question has no universal answer. Many clinicians advise waiting until the uterus has healed and symptoms have stabilised before trying to conceive. The exact interval should be personalised, based on imaging, symptom response, age, and fertility plan.

Alternatives for fertility preservation and symptom control

UAE is one option, not the only option. Women considering pregnancy may also be offered medical therapy, conservative surgery, assisted reproduction, or a combination.

Medical treatment can reduce pain and bleeding, but many options suppress ovulation while being used. Symptoms also may return after stopping treatment. Gonadotropin-releasing hormone agonists may be used before IVF in selected patients, though side effects and timing matter.

Conservative surgery may help in focal adenomyosis, especially adenomyoma, but it can be technically difficult. It may weaken the uterine wall and increase the need for caesarean delivery in a future pregnancy. Diffuse adenomyosis is harder to remove safely.

Fertility preservation can include embryo or egg freezing before treatment, especially when age or ovarian reserve is a concern. This is particularly relevant if UAE might delay conception or affect ovarian function. For some patients, creating embryos before UAE and transferring later may be part of the plan.

The best strategy often combines goals:

Symptom-first approach

Fertility-first approach

Combined approach

Treat pain and bleeding before pregnancy attempts, then reassess fertility.

Preserve eggs or embryos, or proceed with IVF planning before uterine treatment.

Use UAE or another treatment to control adenomyosis, while keeping a clear timeline for conception.

No pathway is right for everyone. The safest plan is one that does not treat the uterus in isolation from the ovaries, embryos, and pregnancy risks.

A written fertility plan can help align treatment, timing, and pregnancy goals.

Care during pregnancy after UAE

Once pregnancy occurs after UAE for adenomyosis, care should shift to early and structured monitoring. This may include early ultrasound to confirm location and viability, assessment of placental position, fetal growth surveillance, and planning for delivery in a centre prepared to manage bleeding or placental complications.

Patients should report heavy bleeding, severe pain, fever, reduced fetal movements later in pregnancy, or symptoms of preterm labour promptly.

A pregnancy after UAE is not automatically unsafe. Many reported pregnancies have resulted in live births. Still, caution is sensible because both adenomyosis and prior uterine vascular treatment may affect placentation and uterine function.

The clearest takeaway from the review

The systematic review supports a balanced message. UAE can be followed by conception and live birth in selected women with adenomyosis. It may also relieve symptoms that make pregnancy planning difficult. Yet the evidence is not strong enough to describe UAE as a proven fertility treatment for adenomyosis.

For women considering UAE before pregnancy, the best next step is detailed counselling rather than a quick yes or no. The discussion should cover symptom severity, ovarian reserve, imaging findings, fertility timeline, alternative treatments, and pregnancy monitoring.

The most useful question is not simply, “Can pregnancy happen after UAE?” The evidence says it can. The better question is, “Is UAE the safest and most sensible part of this person’s fertility plan?” That answer needs individual assessment, careful timing, and honest discussion of both hope and risk.