gynecology

Fertility After Endometrial Ablation: Why It Is Not Contraception

By Dr. Adeeb Alshahrour · January 20, 2023

Endometrial ablation destroys the lining of the uterus to stop heavy periods. It works well for the right patient. But two things about it are consistently under-explained, and both matter enormously.

Ablation is not a form of birth control. And pregnancy after ablation is a high-risk pregnancy — uncommon, but when it happens, considerably more dangerous than a pregnancy in an untreated uterus.

If you are having ablation, or have already had one and are still able to conceive, this is the part you need clearly.

Why ablation is offered only after childbearing is complete

Ablation removes or destroys the endometrium — the layer an embryo has to implant into and the layer the placenta grows from. Scarring and adhesions form afterwards, and the cavity is often partly obliterated. That is precisely how it stops the bleeding, and precisely why it is incompatible with a safe pregnancy.

So the eligibility rule is not a formality. Ablation is for people who have finished having children. If there is any real chance you will want to conceive, ablation is the wrong procedure and you should ask about the alternatives below instead.

Ablation also makes the uterine lining harder to sample and assess afterwards, which can delay the evaluation of future abnormal bleeding. That is a second reason it is not treated as a casual option.

Pregnancy still happens

Fertility is reduced after ablation but it is not eliminated. Reported pregnancy rates after ablation vary across studies but sit in the low single digits of a percent — small, and not zero. Some endometrium regenerates, and areas of the cavity are often incompletely treated.

So contraception is still required, right up until menopause. ACOG advises reliable contraception after ablation, and many patients choose a permanent option. Practical routes:

Concurrent sterilisation. Tubal ligation — or salpingectomy — done at the same time as the ablation, in one anaesthetic. Discuss it before the ablation is scheduled, not after.
Vasectomy for the male partner, if that suits your situation better.
A hormonal IUD. Note that ablation can make later IUD insertion difficult or impossible because of a scarred, contracted cavity, so an IUD is often better placed before or instead of ablation rather than after it. A hormonal IUD is also a genuine alternative treatment for heavy bleeding in its own right.
Other reliable methods, chosen with your history in mind.

Why pregnancy after ablation is dangerous

Give this the weight it deserves without inflating it. The absolute risk is that pregnancy after ablation is uncommon. The relative risk, once pregnant, is high. Both are true.

Abnormal placentation. A damaged, scarred endometrium invites the placenta to implant abnormally deeply — placenta accreta spectrum — and placenta praevia. This is the most serious concern. It carries a risk of catastrophic haemorrhage at delivery and frequently requires hysterectomy. Studies report an order-of-magnitude increase in this risk compared with pregnancies in an unablated uterus.
Miscarriage and pregnancy loss, which account for a large share of the pregnancies that do occur.
Ectopic pregnancy, in a cavity that is scarred and distorted.
Preterm birth, roughly doubled in the published cohorts.
Malpresentation, because a scarred cavity restricts how the baby can lie, raising the chance of breech or transverse position and caesarean delivery.
Preterm rupture of membranes, growth restriction, and stillbirth are all reported.
Uterine rupture has been described, though it is rare.

The numbers behind these come from small series and registry data, not large trials, which is why we describe them as markedly increased rather than quoting one confident figure. The clinical conclusion does not change either way.

If you get a positive test after an ablation

Contact us straight away — do not wait for a routine first prenatal visit at eight or ten weeks.

What early assessment is for:

Confirm the pregnancy is in the uterus. Ectopic pregnancy must be excluded, and it is more likely here than in the general population. Pain, shoulder-tip pain, dizziness, or bleeding with a positive test is an emergency — go to an emergency department.
Establish where the placenta is implanting, with ultrasound, and repeat imaging as the pregnancy progresses. Suspected accreta spectrum changes the entire delivery plan.
Arrange the right level of care. A pregnancy after ablation is managed as high-risk from the beginning, typically with maternal-fetal medicine involvement, and, where accreta is suspected, delivery planned in advance at a centre equipped for major obstetric haemorrhage.

Whatever you decide about the pregnancy, the assessment comes first. Also tell any clinician who sees you in pregnancy that you have had an ablation — it will not necessarily be in the notes in front of them.

If you have heavy bleeding and still want children

Ablation is off the table, but you are not out of options — and heavy periods in your 30s and 40s almost always have a treatable cause worth identifying first. Start with heavy periods: causes, treatment, and when to call, and with a proper evaluation of the bleeding itself.

Fertility-compatible approaches include:

Tranexamic acid on heavy days, and NSAIDs started as bleeding begins. Both non-hormonal, both underused, neither affects future fertility.
Iron replacement, which treats the consequence that is usually making you feel worst.
Hormonal options — combined pills, a hormonal IUD — which are fully reversible when you want to conceive.
Removing the cause. Uterine polyps and cavity-distorting fibroids can be taken out with hysteroscopy or myomectomy, preserving the uterus and, in many cases, improving fertility rather than harming it.
Treating the underlying condition — thyroid disease, a bleeding disorder such as von Willebrand disease, or endometriosis.

If conceiving is proving difficult alongside the bleeding, the two questions belong in the same appointment. See infertility: causes, testing, and treatment.

Talk to us

If ablation has been suggested to you and nobody has asked whether you have finished having children, ask the question yourself before the date is booked.

Medical disclaimer

This article is general health information, not medical advice for any individual. A positive pregnancy test after an endometrial ablation needs urgent assessment, not a routine appointment. Pelvic pain, shoulder-tip pain, faintness, or bleeding with a positive test requires emergency care — an ectopic pregnancy is life-threatening.