Missed Abortion (Missed Miscarriage): Causes, Symptoms, Diagnosis & Safe Management

Missed Abortion (Missed Miscarriage): Causes, Symptoms, Diagnosis & Safe Management:

Disclaimer:

This article is only intended as a source of educational material and does not replace professional medical advice, diagnosis, or treatment. If you are having any pregnancy-related issues, please speak to a qualified healthcare professional who can provide personal guidance suited to your situation.

Author's Notes:

Dr Humaira Latif
Registered Medical Practitioner
Gynaecologist and Obstetrician
14 years' experience in clinical and practical work

Last Updated: 2 March 2026

Introduction:

Pregnancy is a very delicate biological process that relies on precise hormone coordination (hormones working together), genetic stability (the development of an embryo could be disrupted if any of its genes become damaged), and adequate support from the uterus (the uterus needs to be strong enough to hold a developing fetus). In some cases, this lovely journey begins but then doesn't progress as expected. A missed abortion (also known as a missed miscarriage or a silent miscarriage) is one example of this.

On a global scale, it is estimated that about 10-20% of clinically recognized pregnancies end in a spontaneous miscarriage of some type and a large percentage of these occur during the first trimester and are therefore classified as missed miscarriages. Unlike most other types of pregnancy loss, there may be no outward symptoms. This adds to the potential emotional upheaval and the complexity of medical issues involved.

This comprehensive guide outlines the following:

Definitions and Medical Facts

Possible Causes and Risk Factors

Possible Symptoms and

 Diagnostic Indicators

Safe Management Options

Emotional Recovery Process and

Future Pregnancy Planning.

The purpose of this document is to provide clear, evidence-based and compassionate information that is consistent with current obstetric practice.

What is Missed Abortion:

Missed abortion (missed miscarriage) is when:

• The embryo or fetus has stopped growing or developed with no heartbeat.
• The pregnancy tissue will remain in the uterus.
• There will be no immediate bleeding or signs of miscarriage.
• The body hasn't started to miscarry yet (the pregnancy is no longer viable).

By learning how missed abortions are different from other types, you will improve your ability to make decisions regarding the patient's care.

Sign And Symptoms Of Missed Abortions:

Types Of Missed Abortions:

Understanding the Various Types of Miscarriage:

The different types of miscarriage are summed up below in a way to help patients and families understand their options and reduce any unneeded anxiety. Each miscarriage type has some clinical differences in how it is managed.

1.Threatened Miscarriage:

A threatened miscarriage is when a patient experiences bleeding during the first trimester of pregnancy; however, the pregnancy is still healthy. The cervix is closed, and an ultrasound may show an active heartbeat.

In some instances, the patient can successfully carry the pregnancy to full term with proper rest and monitoring; however, it is critical that medical care providers regularly monitor the mother's well-being as well as the developing baby.

The following are the primary characteristics of a threatened miscarriage:

• Light to moderate amount of bleeding
• Minor abdominal pain
• Closed cervix
• Presence of fetal heartbeat

2. Incomplete Miscarriage:

When an incomplete miscarriage occurs, there has been some portion of pregnancy tissue retained in the uterus after the body has already expelled a portion; therefore, the patient may experience another heavier episode of vaginal bleeding in conjunction with significantly more cramping.

Since tissue that remains in the uterus can increase the risk of infection and excessive vaginal bleeding, a medical evaluation will be necessary. The patient may respond to medication or possible surgical intervention, depending on how much tissue is retained in the uterus.

The following is a summary of the primary characteristics of an incomplete miscarriage:

•  Heavy amount of vaginal bleeding
•  Moderate to severe cramping
•  Open cervix
•  Some retained tissue

3. Total Miscarriage :

 A total miscarriage is when all pregnancy tissue has naturally come out of your uterus. There is often less severe bleeding and cramping once the tissue has passed out of your body.

Ultrasound will show that your uterus is empty, and unless you have other medical complications, no other treatment will be needed, but follow up will help ensure that you are recovering and will continue to remain healthy.

• Characteristics of a Total Miscarriage:
• Gradual decrease in bleeding. 
• Resolution of cramping,
• Closure of the cervix after the tissue   leaves the body,
•  Empty uterus per ultrasound.

4. Missed Miscarriage 

(Missed Abortion):

 A missed miscarriage (or missed abortion) occurs when the fetus stops developing, but the pregnancy tissue has not been expelled and remains inside the uterus. It does not typically present with any signs or symptoms immediately after the fetus has stopped developing. 

The cervix is usually closed, and there is generally no to minimal amount of bleeding and/or pain. Diagnosis is made during routine ultrasound, at which point there are no fetal heart tones. 

Depending on the individual situation, management options for a missed miscarriage may be expectative, medical, or surgical. 

Characteristics of a Missed Miscarriage: Little/no bleeding, generally no pain.

• Closed cervix.
• Absent fetal heart tones on ultrasound.
• Retained tissue from pregnancy.

Causes Of Missed Abortion:

The following factors can lead to a missed miscarriage:

1. Chromosomal Abnormalities:

These make up approximately 60-70% of first trimester losses which happen due to random chromosome errors during fertilization. Chromosome errors frequently manifest as an additional chromosome, missing a chromosome, or as a structural defect. These chromosome abnormalities can prevent the normal progress of the embryo.

2. Hormonal Imbalance:

Hormonal imbalances can include low levels of progesterone, thyroid disease (hypothyroidism or hyperthyroidism), and polycystic ovarian syndrome (PCOS). Hormones are the primary regulators of maintaining a healthy endometrium.

3. Uterine Structural Abnormalities:

Examples of uterine structural abnormalities include:

• Septate Uterus
• Large Submucosal Fibroids
• Intrauterine Adhesions
• When the uterine cavity is abnormal, the embryo will not implant properly or develop a normal placenta.

4. Maternal Medical Conditions:

Examples of conditions that can increase the risk of pregnancy loss are:

• Poorly Controlled Diabetes
• Chronic High Blood Pressure
• Clotting Disorders
• Severe Anemia

Proper management of these conditions can significantly decrease the risk of losing a pregnancy.

5. Autoimmune Disorders:

Conditions such as antiphospholipid syndrome or Systemic Lupus Erythromatosis  (SLE). can interfere with the blood supply to the placenta.

6. Infections:

There are some infections that have been linked to pregnancy loss, however, many of the early pregnancy losses are not related to infection.

7. Environmental & Lifestyle Factors:

Some of the many common lifestyle risk factors associated with miscarriage include: smoking, alcohol consumption, high caffeine intake, exposure to toxic chemicals, and radiation. Optimal lifestyle choices prior to and during pregnancy can lead to increased chances of a positive outcome.

Risk Factors for Miscarriage:

Certain factors increase the likelihood of miscarriage but do not guarantee that it will happen. They include:

• Maternal age greater than 35 years
• History of miscarriage
• Excess body weight
• Poor nutrition
• Problems with hormones

Symptoms of Missed Miscarriage:

Unfortunately, many women do not experience symptoms when they have a missed miscarriage. Symptoms that may be experienced can include: 

• Sudden loss of morning sickness or breast tenderness
• Brown spotting on the underwear 
• No movement from the fetus at 20+ weeks 
• Lack of fetal heart rhythm detected by ultrasound 

Many women find out they have had a missed miscarriage during a routine ultrasound appointment.

Diagnosis of Missed Miscarriage:

To ensure no unnecessary or harmful treatment is given, confirmation of a missed miscarriage must be accurate.

Clinical Assessment: 

The physician must get an accurate medical history. This includes performing a pelvic exam, assessing the cervix, which will likely be closed up to the time of fetal expulsion.

Ultrasound:

 An ultrasound examination is performed to provide the most accurate determination of missed miscarriage. Possible findings are:

• Absence of fetal heartbeat 
• Crown-rump measurement less than expected, without heartbeat
• Gestational sac has collapsed, having no heartbeat.

If the initial ultrasound is suspicious, repeat the procedure in 7-10 days.

Blood Tests:

 Serial beta-hCG and serum progesterone will provide additional information and support what was seen on ultrasound.

Types of Treatment for Missed Miscarriage:

Expectant: 

The body can resolve a missed miscarriage by the excretion of fetal tissue naturally, which could take 2-6 weeks.

Advantages: 

Non-invasive, no surgical procedure. 

Supporting Emotionally and Psychologically

Emotional health can be affected after losing a baby.

Healthy strategies for coping:

• Open dialogue with your partner
• Counseling from professionals
• Group support
• Communities and/or religious groups for support
• Taking time to heal

Many women have healthy pregnancies in the future.

Future Planning for Pregnancy:

Preconception care:

a. Correcting anemia

b. Optimizing thyroid function

c. Controlling diabetes

d. Achieving a healthy weight

e. Taking folic acid for at least 3 months prior to conception

Regular prenatal visits:

a. Getting an early ultrasound to confirm pregnancy

b. Getting routine blood tests

c. Learning how to eat properly

Commonly Asked Questions

1.Will a missed miscarriage be painful?

Yes. There are a number of women who experience a missed or incomplete miscarriage without any pain, bleeding or cramping.

2.Is a blighted ovum considered a missed miscarriage?

No. A blighted ovum would result in no embryo being made. It is a specific type and is different than a missed miscarriage.

3.When can I try for another pregnancy?

Generally after one normal period, depending on what your physician says.

4.Does a miscarriage equal infertility?

No, the majority of women become pregnant after a miscarriage.

Miscarriage Prevention:

Miscarriages can't be prevented, but risk factors can be reduced by keeping a healthy BMI, eating properly, avoiding any alcohol or tobacco, getting early prenatal care, and managing chronic illnesses.

Disadvantages: 

Requires follow-up appointments, potential for unpredictable bleeding.

While there is no way to completely prevent a miscarriage from happening, there are ways you can reduce your risk of having one by:

• Keeping your body fat percentage within the healthy range for pregnancy.
• Eating a healthy diet filled with fruits, vegetables, whole grains, lean protein, and healthy fats.
• Avoiding smoking or using tobacco while pregnant.
• Not drinking any alcohol while pregnant.
• Having early prenatal care to track the health of you and your baby throughout your pregnancy.
• Having a plan in place to manage any chronic medical conditions that may affect your pregnancy.

Related Articles:

1. Early Pregnancy Care Guide.

 2. Understanding Hormonal Balance in Women.

3. Fertility Health Education

4. Safe Pregnancy Nutrition Plan

Resources: 

The following resources were consulted:

• American College of Obstetricians and Gynecologists (ACOG) Early Pregnancy Loss Practice Bulletin (2025).

• World Health Organization (WHO) Reproductive Health Guidelines (2024).

• Royal College of Obstetricians and Gynaecologists (RCOG) Early Miscarriage Information Leaflet (2025).

Author:

Dr Humaira Latif

Registered Medical Practitioner 

Gynaecologist/Obstetrician 

14+ years of Experience in Medical and Practical Field 

Medical and Health Content Creator.