Doctors ask for an ultrasound after an abortion to confirm three things: that the womb is empty, that the pregnancy has ended, and that bleeding or pain is not coming from retained tissue, infection or an ectopic pregnancy. The WHO 2022 abortion care guideline says routine follow-up is not necessary after an uncomplicated medical abortion, and NICE recommends a urine pregnancy test, not a scan, as the standard check. A scan is ordered when symptoms or the circumstances of the abortion raise a doubt.
Is an ultrasound routinely needed after an abortion?
No. The WHO summary chart for its 2022 abortion care guideline states that routine follow-up is not necessary after an uncomplicated medical abortion using mifepristone and/or misoprostol, as long as the woman knows where to get help if she needs it. The NHS says that if the abortion was carried out at a clinic, you do not usually need any other tests or appointments afterwards.
For a medical abortion done at home, the standard check is a pregnancy test, not a scan. NICE guideline NG140 (recommendation 1.14.1) says women who have a medical abortion up to 10 weeks with expulsion at home should be offered self-assessment, including by telephone or text message, as an alternative to a clinic visit. Recommendation 1.14.2 says providers should give a low-sensitivity or multi-level urine pregnancy test to exclude an ongoing pregnancy. The NHS describes the same practice: the provider arranges a follow-up by phone or text and may send a special pregnancy test.
India is different in one way. A 2021 paper in the Indian Journal of Community Medicine cites an estimate of 15.6 million abortions in India in 2015, of which 11.5 million (73%) were medication abortions done outside health facilities. Many women therefore have no provider to call. When such a woman later sees a doctor with bleeding or doubt, a pelvic ultrasound is the fastest way to find out what is going on inside the womb.
What does the scan check for?
The scan answers four questions: is the womb empty, is the pregnancy still growing, was the pregnancy inside the womb at all, and is there another cause for the symptoms. The NHS lists the main complications of abortion as part of the pregnancy remaining and needing an operation to remove it, heavy bleeding, damage to the womb, and infection including sepsis. MedlinePlus says follow-up after a medical abortion is to make sure the process was completed and all the tissue was expelled.
- Retained tissue: pregnancy tissue or placenta left in the womb. On a scan it shows as material in the cavity and a thick, uneven lining.
- Ongoing pregnancy: a gestational sac that is still present, sometimes with a heartbeat. MedlinePlus lists this as a rare outcome where the medicine does not work.
- Ectopic pregnancy: NICE says that if an abortion is done before a scan has shown a yolk sac inside the womb, there is a small chance the pregnancy was ectopic and follow-up may be needed to ensure the pregnancy has ended and to monitor for ectopic pregnancy.
- Infection and injury: the NHS warns that an untreated womb infection can cause pelvic inflammatory disease, which raises the risk of infertility and ectopic pregnancy.
When does a doctor order a scan after a medical abortion?
A doctor orders a scan after a medical abortion when symptoms, the timeline or the pregnancy test suggest the process is not complete. The NHS says the pregnancy should begin to pass about 4 to 6 hours after the second medicine, misoprostol, and that a further dose may be needed if it does not come out completely. The WHO summary chart also allows repeat misoprostol doses when needed. If bleeding never starts, or is very light, a scan shows whether the sac is still there.
The NHS lists the triggers for urgent advice after any abortion: pain or bleeding that does not get better within a few days, still feeling pregnant after about a week, and signs of infection such as a temperature, flu-like feelings or unusual discharge. Each of these usually leads to a scan.
Two other situations matter. NICE recommendation 1.9.2 says that when mifepristone and misoprostol are taken at the same time the risk of ongoing pregnancy may be higher, so the follow-up programme matters more. And if the pills were taken before any scan confirmed a pregnancy inside the womb, NICE says follow-up appointments may be needed to rule out an ectopic pregnancy. In India, where pills are often bought without a prior scan, a gynaecologist will usually want one scan to close that question.
When is a scan done after a surgical abortion?
After a surgical abortion in a clinic a scan is not routine; the NHS says you do not usually need other tests or appointments afterwards. The surgeon checks that the cavity is empty during the procedure itself.
A later scan is ordered if complications are suspected. The NHS says the risk of complications increases the longer the pregnancy continues, and lists retained pregnancy tissue needing a second operation, heavy bleeding, damage to the womb and infection. A scan separates these: retained tissue shows as material in the cavity, a collection of blood shows as fluid, and a normal empty womb with a thin lining points to another cause, such as infection, for the pain or fever.
Finding retained tissue does not always mean another operation. A Cochrane review of 24 studies with 5,577 women found that misoprostol tablets are an important alternative to surgery for incomplete miscarriage before 13 weeks, with a slightly lower complete-evacuation rate than surgery (RR 0.96) but far fewer planned operations. The same medicine is used after an incomplete abortion. The choice depends on how heavy the bleeding is and how the woman is doing, so the scan report is only one input.
How reliable is a scan that reports 'retained products'?
Less reliable than most reports make it sound, which is why symptoms matter more than millimetres. A 2021 scoping review in Acta Obstetricia et Gynecologica Scandinavica looked at 248 studies with 339,517 participants and found no agreed definition of retained products of conception. The most common criterion was a transvaginal lining thickness of 15 mm or more, measured about 2 weeks after treatment, but studies used 89 different cut-off values. Only three studies checked whether the 15 mm rule was right; in those it had a specificity of 94% or more and a sensitivity of 75% to 100%.
The largest test of lining thickness after medical abortion is a 2009 study in Ultrasound in Obstetrics and Gynecology that pooled 2,208 women scanned about 7 days after misoprostol. Women who later needed a dilatation and curettage had a mean lining of 14.5 mm against 10.9 mm in those who did not, but the overlap was so large that the measurement was poorly predictive (area under the curve 0.65) and no threshold had a positive predictive value above 25%. Only 30 women (1.6%) needed surgery at all.
The practical meaning: a thick or uneven lining a week after an abortion is common and usually passes with the next period. A doctor treats the woman, not the number, and acts on heavy bleeding, pain, fever or a persisting sac.
When is the best time for the scan, and what are the alternatives?
The best time is when there is a reason; if a routine check is wanted, about 2 weeks after the abortion rather than the next day. The scoping review found 2 weeks was the most common follow-up point. A scan in the first days shows blood, clots and a thick lining in almost everyone.
| Check | Usual timing | What it tells you | Limits |
|---|---|---|---|
| Symptom self-assessment | From day 1 | Bleeding started, pregnancy signs fading | Cannot rule out ectopic or quiet retained tissue |
| Low-sensitivity urine pregnancy test | About 3 weeks after the pills | Negative result excludes ongoing pregnancy | Positive result needs a clinic visit and usually a scan |
| Serum hCG blood test | Day of the pills and about 7 days later | A falling level confirms the pregnancy has ended | Two blood draws; cost and a lab visit |
| Transvaginal ultrasound | When symptoms or test results raise doubt; about 2 weeks if routine | Empty womb, retained tissue, persisting sac, ectopic clues | Lining thickness alone is a weak guide |
The timings come from a 2025 trial protocol in Trials: the low-sensitivity urine test is usually done 3 weeks after an early medical abortion, and the serum hCG method compares the day-0 and day-7 levels. It notes that few trials compare these tests with ultrasound. Scan prices in India are on the ultrasound cost page.
What should you do after an abortion in India?
Keep the provider's number, watch the bleeding, and go for a scan only if something is wrong or a test stays positive. The NHS says cramps last a few days and vaginal bleeding can last several weeks after a medical or surgical abortion; MedlinePlus says a normal period should return in about 4 to 6 weeks. The NHS also advises using sanitary pads so you can see how much you are bleeding, and starting contraception at once because it is possible to get pregnant straight after an abortion.
See a doctor the same day, or call 112 for an ambulance, if you are soaking a pad soon after putting it on, have a fever or foul-smelling discharge, have severe one-sided pain or shoulder-tip pain, feel faint, or still feel pregnant a week later. Government district hospitals and medical colleges provide emergency care and scans round the clock.
The Medical Termination of Pregnancy (Amendment) Act 2021, published in the Gazette of India, added section 5A: a registered medical practitioner may not reveal the name or particulars of a woman whose pregnancy was terminated, except to a person authorised by law. You can ask any gynaecologist or government hospital for post-abortion care without explaining where the abortion was done. This guide is general information from the sources listed below, not medical advice; a registered doctor makes decisions with you.
