About Blighted Ovum

Overview

A blighted ovum, also known as an anembryonic gestation or anembryonic pregnancy, occurs when a fertilized egg implants in the uterus but does not develop into an embryo. The placenta and embryonic sac form, but remain empty, without a growing baby. Despite the absence of an embryo, the placenta still produces human chorionic gonadotropin (hCG), a hormone that supports pregnancy. As a result, a blighted ovum can lead to a positive pregnancy test even though the pregnancy is not progressing. Symptoms, such as sore breasts and nausea, may also occur. A blighted ovum typically leads to miscarriage and is often discovered during the first ultrasound given during a prenatal appointment. It is most commonly diagnosed between the 8th and 13th weeks of pregnancy. The exact cause of blighted ovum is unknown but is thought to be related to chromosomal abnormalities within the fertilized egg.

Causes and Risk Factors

The exact causes of a blighted ovum are not known, but it is believed to be caused by chromosomal abnormalities within the fertilized egg. Chromosomal abnormalities are problems with the DNA (the blueprint of how the cell should work) of the fertilized egg. This can be due to genetics or problems with the eggs or sperm. It has been suggested that abnormalities within chromosome 9 may be linked to a blighted ovum.

• Modifiable risk factors for blighted ovum are factors that can be influenced or changed, including:Incessant ovulation (continuous ovulation)
• Repeated rupture and repair of ovarian follicles with continued exposure to gonadotropins (a type of hormone)
• Nulliparity (never given birth)
• Infertility (difficulty or inability to become pregnant)
• Gynecologic disease such as endometriosis and polycystic ovary syndrome (PCOS)
• Postmenopausal hormonal therapy
• Intrauterine devices (IUDs)
• Obesity
• Cigarette smoking
• Exposure to talc and asbestos

It's important to note that while these factors have been associated with an increased risk of blighted ovum, they do not guarantee that a person will develop the condition. Each individual's situation is unique and it's best to consult with a healthcare professional for personalized advice.

Symptoms

The most common early symptoms of a blighted ovum include:

• Positive pregnancy test
• Sore breasts
• Missed period

As the pregnancy progresses, other symptoms of a blighted ovum include:

• Vaginal spotting or bleeding
• Abdominal cramping
• Disappearance of breast soreness

It's important to note that these symptoms can also be associated with miscarriage. It's essential to consult with your healthcare professional for an accurate diagnosis and appropriate management.

Diagnosis

To diagnose a blighted ovum, the following examinations, tests, and procedures are commonly performed:

• Ultrasound: This is the primary method used to diagnose a blighted ovum. During an ultrasound, a healthcare provider will use sound waves to create images of the uterus. A blighted ovum can be identified if the ultrasound shows an empty gestational sac without an embryo.
• Serial Ultrasound: Multiple ultrasounds may be done over a period of time to monitor the development of the gestational sac and to confirm that there is no embryo present.
• Blood Tests: Blood tests can measure the levels of human chorionic gonadotropin (hCG), a hormone produced during pregnancy. In cases of blighted ovum, hCG levels may not rise as expected or may plateau or decline.

It's important to note that these examinations, tests, and procedures should be performed by healthcare professionals who specialize in obstetrics and gynecology. They will be able to provide accurate diagnoses and determine the stage or severity of a blighted ovum based on the results.

Treatment Options

The goals of treatment for blighted ovum are to manage the symptoms and support the natural process of miscarriage. Treatment options may include:

• Waiting for natural miscarriage: In some cases, the body will naturally recognize the blighted ovum and initiate a miscarriage. This option involves monitoring for signs of miscarriage, such as vaginal bleeding or cramping, and allowing the body to expel the pregnancy tissue on its own.
• Medication: Your doctor may prescribe medication, such as misoprostol, to help induce a miscarriage. Misoprostol causes the uterus to contract and expel the pregnancy tissue. It is important to discuss potential side effects and risks with your doctor before considering this option.
• Dilation and curettage (D&C): This surgical procedure involves dilating the cervix and removing the pregnancy tissue from the uterus. It may be recommended if other methods are unsuccessful or if there are concerns about incomplete miscarriage.

It is important to note that while these treatments can help manage the physical aspects of blighted ovum, they cannot prevent or reverse the condition itself. Each treatment option has its own benefits and risks, so it is essential to discuss them thoroughly with your doctor to make an informed decision.

Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Other side effects can occur. Check with your health care professional or read the information provided with your medication for additional side effect information.