Medical abortion: methods of termination

Medical termination of pregnancy is the termination of pregnancy using antiprogestogen drugs and prostaglandins. This method is recognized by clinical guidelines as effective and safe in early pregnancy and can be performed in primary care settings, and, if appropriate, with elements of self-management and telemedicine support. Early termination is typically 95-98% effective, and serious complications are rare. [1]

The decision on the method is based on the individual's preferences, the stage of pregnancy, any contraindications, and the availability of qualified care in case of unforeseen situations. The World Health Organization emphasizes that quality care should be accessible, timely, non-discriminatory, and safe. [2]

In recent years, evidence has accumulated on the safety of very early initiation of the procedure, prior to ultrasound imaging of pregnancy, and on the equal effectiveness of home and inpatient settings up to 12 weeks where permitted by law. These findings expand care options and reduce delays in access to treatment. [3]

Telemedicine models for early medical abortion have been shown to be well tolerated, have comparable efficacy, and have no increased complication rate, particularly when clear instructions, 24-hour access, and understandable criteria for urgency are provided.[4]

When the method is suitable and when it is contraindicated

Indications include the individual's desire to terminate the pregnancy within a medically acceptable timeframe, the ability to understand the medication instructions, and access to emergency care if needed. For pregnancies up to 12-14 weeks, most guidelines prefer a combination of an antiprogestogen and misoprostol due to its greater efficacy and predictability. [5]

Absolute contraindications: confirmed or suspected ectopic pregnancy, chronic adrenal insufficiency, long-term use of systemic glucocorticosteroids, severe bleeding disorders, uncorrected severe anemia, known hypersensitivity to the components of the regimen. The intrauterine device (IUD) must be removed before starting the medical abortion. [6]

Relative limitations are discussed on an individual basis: the presence of severe comorbidities, the inability to follow instructions, or lack of communication with a healthcare professional. In such situations, vacuum aspiration may be preferable. [7]

Routine ultrasound is not required prior to the procedure unless there are symptoms or high-risk factors for ectopic pregnancy. Risk assessment is based on complaints, medical history, and tests, if necessary. Ultrasound diagnostics are indicated for pain, fainting, severe unilateral pain, and significant risk based on medical history. [8]

Table 1. Indications and limitations

Category	Examples
Fits	Early stages, informed consent, access to communication and support
Not suitable	Suspected ectopic pregnancy, severe contraindications to medications
Caution is required	Complex concomitant diseases, inability to contact a healthcare professional
Ultrasound is needed	Abdominal pain, fainting, high risk of ectopic pregnancy

Preparation and assessment before starting

The goals of pre-treatment assessment are to confirm the approximate gestational age, rule out obvious contraindications, discuss the pain management and follow-up plan, and explain expected sensations and danger signs. In most cases, a clinical assessment is sufficient without mandatory tests and ultrasound, which reduces delays in access to treatment. [9]

Rh testing and anti-D immunoglobulin prophylaxis at gestations less than 12 weeks are not recommended by many current guidelines, as the impact on the risk of sensitization is minimal. Approaches may vary between organizations and jurisdictions, so decisions are made in the context of local regulations. [10]

Before starting, it's important to discuss future contraception options and agree on when to start, as most options can be started immediately after the abortion. This reduces the risk of unplanned pregnancy in the coming months. [11]

If symptoms suggesting a possible ectopic pregnancy are present, targeted diagnostic testing should be performed before taking medication. Routine "screening" ultrasounds for everyone does not improve outcomes and increases waiting times. [12]

Medical termination of pregnancy up to 12 weeks

The standard combination is mifepristone 200 mg orally once, followed 24-48 hours later by misoprostol 800 mcg buccally, sublingually, or vaginally. If there is no effect, additional doses of misoprostol 400 mcg may be administered at intervals of approximately 3 hours until a clinical response is achieved. The choice of route of administration is determined by tolerability, preference, and the clinical situation. [13]

At 10-12 weeks, repeat misoprostol administration is often required after the initial dose. This is not associated with an increased risk of serious complications with proper monitoring and instruction on danger signs. The regimen's effectiveness remains high with adequate repeat doses. [14]

If mifepristone is not available, a misoprostol-only regimen at the recommended doses with additional doses given 3 hours apart may be used, although the efficacy is generally lower than that of the combination regimen.[15]

Evidence shows that very early treatment before ultrasound visualisation of the gestational sac is as effective as the standard delayed approach, provided there are clear instructions and a commitment to further follow-up if needed.[16]

Table 2. Comparison of regimens up to 12 weeks

Scheme	Doses and intervals	Efficiency	Comments
Mifepristone plus misoprostol	200 mg mifepristone, after 24-48 hours 800 mcg misoprostol, then if needed 400 mcg every 3 hours	High	Select mode up to 12 weeks
Misoprostol only	800 mcg start, then additional doses of 800 or 400 mcg after 3 hours as indicated	Below	Used when mifepristone is unavailable
Very early start	Standard doses, no waiting for ultrasound	Not inferior	Requires clear instructions and communication

Expected sensations and normal reactions

The key symptoms to expect after taking misoprostol include: wave-like lower abdominal pain, bleeding of varying intensity, and the passage of clots and tissue fragments. The most intense pain usually occurs between 2 and 4 hours after taking misoprostol and typically lasts for about 1 hour, then subsides. [17]

Bleeding during a medical abortion is usually heavier than with a menstrual period and lasts on average about 9 days, but can vary in duration. Small "waves" of bleeding during the first few weeks are possible and do not always indicate incomplete abortion. [18]

Minor side effects include nausea, diarrhea, chills, and a short-term increase in temperature after taking misoprostol. These effects are due to the pharmacological action of the prostaglandin and usually resolve spontaneously.[19]

It is critical to receive written instructions in advance, listing warning signs and providing 24-hour contact information for a medical professional. This improves safety and psychological comfort. [20]

Table 3. Typical chronology of sensations

Time	What usually happens
0-24 hours after mifepristone	Often without any obvious sensations
1-6 hours after misoprostol	Increasing cramping pain, onset of bleeding
6-24 hours	Peak of symptoms, passage of clots and tissue
2-7 days	Gradual decrease in pain, moderate bleeding
Up to 4 weeks	Episodes of moderate bleeding and spotting are possible.

Red Flags: When Urgent Help Is Needed

Immediate assistance is required if you wet 2 or more full sanitary pads per hour for 2 consecutive hours, experience dizziness, fainting, severe abdominal pain on one side, shoulder pain, persistent high fever, foul-smelling discharge, or if pregnancy symptoms persist.[21]

Lack of bleeding within the first 24 hours after misoprostol, increasing pain, or recurrence of fever after a few days warrants evaluation for incomplete abortion or infection and may require vacuum aspiration.[22]

Any new severe pain with a drop in blood pressure, pallor, weakness, especially with scanty bleeding, is a reason to exclude an ectopic pregnancy with the help of emergency diagnostics. [23]

It is important to know the address of the nearest emergency department in advance and be able to get there quickly if needed. [24]

Table 4. Danger signs

Sign	Action
Very heavy bleeding	Seek emergency medical attention immediately
Severe one-sided pain, shoulder pain	Rule out ectopic pregnancy
Persistent high fever or foul-smelling discharge	Assess for infection and begin treatment
No bleeding after misoprostol	Urgent consultation
Persistent pregnancy symptoms	Completion control, possible intervention

Pain relief and support

Nonsteroidal anti-inflammatory drugs are recommended for prophylaxis and as needed. Ibuprofen at a dose of 400-800 mg, as prescribed by a physician, reduces pain and does not reduce the effectiveness of the abortion. Antispasmodics, antiemetics, and non-drug support methods may also be used. [25]

Proper pain management increases satisfaction and reduces anxiety. A pain management plan is discussed before medication initiation, taking into account comorbidities and preferences. [26]

Narcotic analgesics are not usually required, but may be considered individually if basic therapy is insufficient under the supervision of a specialist. [27]

Psychological support and access to reliable information reduce stress and improve perception of the process. Hotlines and clear reminders are helpful. [28]

Table 5. Pain relief options

Means	When to start	Notes
Ibuprofen	30-60 minutes before misoprostol and then as needed	The drug of choice in the absence of contraindications
Paracetamol	In case of intolerance to non-steroidal drugs	Less analgesic potency
Antispasmodics	As needed	Complement the basic scheme
Non-drug measures	As desired	Warmth, rest, support of loved ones

Completion control and follow-up

Routine ultrasound to confirm completion is not necessary. Approaches include low-sensitivity urine pregnancy tests after 1–2 weeks, serial quantitative human chorionic gonadotropin tests if in doubt, and a clinical assessment of complaints and well-being. [29]

If an incomplete abortion or ongoing pregnancy is suspected, additional misoprostol or vacuum aspiration may be required. The decision is based on a combination of symptoms, test results, and the individual's preferences. [30]

Telemedicine programs use combined monitoring strategies, including remote counseling, scheduled testing, and instructions for contact in case of warning signs.[31]

Having a clear management plan in place in advance reduces anxiety and unplanned hospital admissions.[32]

Table 6. Completion control methods

Method	Term	Completion Criteria
Low sensitivity pregnancy test	14 days	Negative result
Serial human chorionic gonadotropin	48-72 hours between measurements	Significant decrease in concentration
Clinical evaluation	Individually	Disappearance of pregnancy symptoms, normalization of well-being
Ultrasound as indicated	As needed	No signs of ongoing pregnancy

Effectiveness and risks compared to vacuum aspiration

The combination of mifepristone and misoprostol in the first trimester provides a high rate of complete abortion, similar to that of the surgical method. Severe complications are rare. The choice of method is determined by medical and personal factors, as well as service availability. [33]

Systematic reviews show that the combination regimen is superior to misoprostol alone. With proper monitoring, the risks of bleeding and infection remain low. [34]

Current evidence supports comparable outcomes when home-based and inpatient interventions are performed early, allowing for reduced barriers to access without compromising safety. [35]

Specific situations such as anemia and later stages require individual assessment and a backup intervention plan if needed.[36]

Table 7. Efficacy and complications

Parameter	Combination	Misoprostol only	Vacuum aspiration
Complete abortion	High	Below	Very high
Serious complications	Low	Low	Low
Need for backup intervention	Low	Higher	Low
Possibility of doing it at home	Yes	Yes	Limited

Self-government and telemedicine while observing safety conditions

For periods of up to 12 weeks, some stages can be completed independently, provided there are clear written instructions, access to consultation, and a willingness to monitor the outcome. This approach is considered safe and acceptable. [37]

The telemedicine model includes remote consultations, official medication delivery, a monitoring kit, and a clear action plan for addressing warning signs. This improves the timeliness of treatment initiation and patient satisfaction. [38]

A recent analysis has shown that home delivery for up to 12 weeks is comparable in effectiveness and safety to hospital delivery if organizational requirements are met and the patient is provided with support.[39]

Legal regulations vary by country and region, which should be taken into account when planning how to receive assistance. This material is for informational purposes only and does not replace consultation with local legislation. [40]

Table 8. Criteria for safe self-government

Component	What is required
Information	Step-by-step instructions for use and danger signs
Connection	24-hour contact with a health worker
Backup plan	Address of the nearest emergency care
Control	Scheduled testing and symptom-based monitoring

Rhesus Factor and Anti-D Immunoglobulin: Updates

The 2024 professional guideline update recommends against routine testing and administration of anti-D at gestations less than 12 weeks in the context of abortion or early pregnancy loss, based on the extremely low likelihood of immune sensitization and the lack of impact on outcomes. This decision is based on an analysis of the totality of evidence and should be aligned with local regulations. [41]

At 12 weeks or more, and for invasive procedures, approaches may differ and more often involve anti-D prophylaxis, which should be discussed in light of current protocols.[42]

It is important to discuss an individual plan with a medical specialist in advance, depending on the timing, pregnancy history and Rh status. [43]

Table 9. Anti-D at different times

Time and situation	Routine anti-D prophylaxis
Less than 12 weeks, medical abortion	Not recommended by many modern guidelines
12 weeks or more, or invasive interventions	More often shown according to local protocols
Uncertainty and complex cases	A customized solution that takes into account the rules of the healthcare system

Antibiotics and infection prevention

Routine prophylactic antibiotic use during medical abortion is not recommended because the risk of infection is low and the benefit of prophylaxis has not been proven. Antibiotics are prescribed when there is evidence of infection or a known infection. [44]

In surgical interventions, prophylaxis has been shown to reduce the risk of infectious complications and is often included in standard preparation, but the lack of antibiotics should not delay necessary care.[45]

Screening and treatment for sexually transmitted infections are performed as indicated, without delaying abortion, unless there is evidence of a systemic infection requiring urgent therapy. [46]

Information about hygiene measures and criteria for urgent treatment reduces the risk of complications and allows timely initiation of treatment if necessary. [47]

Table 10. Antibiotics: when needed and when not

Situation	Approach
Medical abortion without signs of infection	Prevention is not necessary
Suspected or signs of infection	Treatment according to standards without delay of assistance
Surgical intervention	Prevention according to the protocol
Lack of drugs	The procedure should not be delayed; it should be assessed individually.

Contraception after abortion

Almost all contraceptive methods can be started immediately after the abortion, including combined hormonal methods, progestogen-only methods, and intrauterine devices (IUDs) if there are no signs of infection. The choice is based on medical criteria and the individual's preferences. [48]

Early initiation of contraception reduces the risk of unplanned pregnancy in the first weeks after an abortion. It is recommended to discuss the goals and possible side effects of different methods in advance. [49]

Long-acting, highly effective methods are readily available, which is especially important for those who want to minimize daily activities. The decision regarding intrauterine device use is made by a physician based on the clinical picture. [50]

For those who prefer barrier methods, it is important to discuss the correct technique and combination with spermicides if increased protection is desired.[51]

Table 11. When to start different methods

Method	When to start
Hormonal pills	On the day of confirmation of completion of the abortion
Implant, injection forms	On the day of completion or on an agreed date
Intrauterine device	Immediately after confirmed completion in the absence of infection
Barrier methods	Immediately

Frequently asked questions

Is it painful?
Pain varies, often moderate to severe for a short period after taking misoprostol, and responds well to nonsteroidal anti-inflammatory drugs.[52]

Can this be done at home?
If you're up to 12 weeks along with instructions, communication, and a backup plan, home birthing is acceptable and comparable in safety to hospitalization. Follow local guidelines. [53]

Does everyone need an ultrasound?
No, it is not routinely required. It is needed if there are symptoms or risk factors for an ectopic pregnancy, or if clinically indicated. [54]

What about the Rh factor?
At less than 12 weeks of pregnancy, many guidelines do not recommend routine testing or anti-D prophylaxis. Check local guidelines. [55]