Missed Miscarriage or Blighted Ovum
What is Missed Miscarriage or Blighted Ovum?
A missed miscarriage happens when a pregnancy stops developing, but the body does not recognize the loss right away. The embryo or fetus stops growing, but the uterus retains the tissue instead of expelling it. This means you may still feel pregnant and have no typical miscarriage symptoms like bleeding or cramping.
A blighted ovum is a specific type of missed miscarriage. It occurs when a fertilized egg implants in the uterus but never develops into an embryo. The gestational sac forms, but it remains empty. Your body may continue producing pregnancy hormones for days or weeks, which is why you might still have positive pregnancy tests.
Both conditions are usually discovered during routine ultrasound appointments. Healthcare providers look for expected signs of development based on how far along you should be. These pregnancy losses are common, affecting about 10 to 20 out of every 100 known pregnancies. They are rarely caused by anything you did or did not do.
Symptoms
- Continued positive pregnancy tests despite pregnancy loss
- Pregnancy symptoms that suddenly stop or decrease, such as breast tenderness or nausea
- Light vaginal spotting or brown discharge
- Cramping or pain in the lower abdomen or pelvis
- Loss of typical pregnancy symptoms like fatigue or morning sickness
- No fetal heartbeat detected during ultrasound
- Bleeding that may become heavier over time
Many people with a missed miscarriage or blighted ovum have no symptoms at all. The pregnancy simply stops developing silently. This is why the condition is often discovered during a routine prenatal ultrasound rather than through noticeable warning signs.
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Causes and risk factors
Most missed miscarriages and blighted ovums happen due to chromosomal abnormalities in the fertilized egg. These genetic errors occur randomly during conception and are not inherited from parents. When cells divide incorrectly, the embryo cannot develop properly. The body recognizes this and stops the pregnancy. Other causes include poor egg or sperm quality, abnormal cell division, or problems with how the fertilized egg implants in the uterine lining.
Risk factors include advanced maternal age, particularly over age 35, previous miscarriages, uncontrolled chronic conditions like diabetes or thyroid disorders, and certain infections. Lifestyle factors such as smoking, heavy alcohol use, and excessive caffeine intake may also increase risk. However, most cases happen without any identifiable risk factors. It is important to know that missed miscarriage is rarely caused by stress, exercise, or daily activities during early pregnancy.
How it's diagnosed
Missed miscarriage and blighted ovum are typically diagnosed through ultrasound imaging. Your healthcare provider will look for specific signs like an empty gestational sac, lack of fetal heartbeat, or a gestational sac that is too small for the expected pregnancy dates. Transvaginal ultrasound provides the clearest view during early pregnancy. Often, a follow-up ultrasound is scheduled one to two weeks later to confirm the diagnosis before any treatment decisions are made.
Blood tests measuring hCG levels help monitor early pregnancy health. Human chorionic gonadotropin, or hCG, is a hormone produced during pregnancy. Healthy pregnancies show rising hCG levels that typically double every 48 to 72 hours in the first weeks. Low levels or slow increases can indicate a missed miscarriage or blighted ovum. Rite Aid offers hCG testing as an add-on to help you track pregnancy hormone levels at Quest Diagnostics locations nationwide. Serial testing over several days provides the most useful information about how your pregnancy is progressing.
Treatment options
- Expectant management, which means waiting for the body to naturally pass the pregnancy tissue
- Medication such as misoprostol to help the uterus expel tissue more quickly
- Surgical procedure called dilation and curettage, or D&C, to remove tissue from the uterus
- Monitoring hCG levels after treatment to confirm levels return to zero
- Emotional support through counseling, support groups, or therapy
- Physical rest and self-care during recovery
- Iron supplementation if bleeding causes anemia
- Follow-up appointment with your healthcare provider to discuss future pregnancy planning
- Waiting one to three menstrual cycles before trying to conceive again, depending on provider guidance
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Frequently asked questions
A blighted ovum is a type of missed miscarriage where the fertilized egg implants but never develops into an embryo. The gestational sac forms but remains empty. A missed miscarriage is a broader term that includes blighted ovum and also refers to when an embryo starts developing but then stops growing. Both involve pregnancy loss without immediate symptoms.
You can carry a missed miscarriage for several weeks without any symptoms. Some people discover the loss at their first prenatal ultrasound, which may be weeks after the pregnancy stopped developing. Your body may continue producing pregnancy hormones during this time, which is why you might still feel pregnant and test positive on home pregnancy tests.
In a missed miscarriage, hCG levels may rise more slowly than expected or plateau instead of doubling every 48 to 72 hours. Levels may also start to decrease. Normal early pregnancy shows rapidly rising hCG, so levels that stall or drop can indicate pregnancy loss. Serial blood tests over several days help track the pattern.
Most missed miscarriages and blighted ovums cannot be prevented because they are caused by random chromosomal abnormalities. However, you can reduce some risk factors by managing chronic health conditions like diabetes and thyroid disorders, avoiding smoking and alcohol, limiting caffeine, and taking prenatal vitamins with folic acid. Even with healthy habits, these pregnancy losses can still occur.
You have three main treatment options. Expectant management means waiting for your body to naturally pass the tissue, which can take days to weeks. Medication like misoprostol speeds up the process by causing the uterus to contract and expel tissue. Surgical removal through a D&C procedure is the fastest option and may be recommended in certain situations.
Many healthcare providers recommend waiting for one to three menstrual cycles before trying to conceive again. This allows your body to recover physically and gives your uterine lining time to rebuild. Some research suggests it is safe to try sooner if you feel emotionally ready. Discuss your specific situation and timeline with your healthcare provider.
Yes, pregnancy tests can remain positive for days or weeks after a missed miscarriage. Your body continues producing hCG even though the pregnancy is no longer developing. Levels will eventually decline and tests will turn negative. Your healthcare provider may monitor hCG levels with blood tests to confirm they return to zero after treatment.
No, having one missed miscarriage does not mean you will have another. Most people who experience one early pregnancy loss go on to have healthy pregnancies. The risk of recurrent miscarriage, defined as two or more consecutive losses, is relatively low. If you do experience multiple losses, your healthcare provider may recommend additional testing to look for underlying causes.
Watch for heavy bleeding that soaks through more than two pads per hour for two hours or longer. Contact your healthcare provider if you develop fever over 100.4 degrees, severe abdominal pain that does not improve with medication, foul-smelling vaginal discharge, or dizziness and fainting. These could signal infection or other complications that need immediate medical attention.
HCG testing is very helpful but must be used alongside ultrasound for diagnosis. A single hCG test cannot diagnose missed miscarriage, but serial tests showing slow-rising or declining levels raise concern. Your healthcare provider will compare hCG patterns with ultrasound findings and your dates to make an accurate diagnosis. Multiple data points provide the clearest picture of pregnancy health.