What Is an Ectopic Pregnancy and Why Does It Occur?
Ectopic pregnancy is a serious pregnancy complication that occurs when a fertilized egg implants somewhere outside the uterus instead of settling inside the uterine cavity. Medically known as an “ectopic pregnancy,” this condition is most commonly seen in the fallopian tubes. More rarely, it may develop in areas such as the ovary, cervix, around a previous cesarean scar, or within the abdominal cavity.
Under normal conditions, fertilization takes place in the fallopian tube, and the developing embryo moves into the uterus within a few days to implant there. However, this journey may not be completed properly due to structural problems in the tubes, infections, or other factors that affect the movement of the embryo. In such cases, the embryo begins to develop in an area outside the uterus.
Tissues outside the uterus are not designed to support the growth of a pregnancy. As the pregnancy progresses, it can cause stretching, pain, and a serious risk of bleeding in the area where it has implanted. Especially in ectopic pregnancies that develop in the fallopian tube, rupture of the tube may lead to life-threatening internal bleeding, which makes early diagnosis extremely important.
Ectopic pregnancy does not always occur in people with clear risk factors. However, previous pelvic infections, tubal surgeries, endometriosis, smoking, a history of ectopic pregnancy, and some fertility treatments may increase the risk. Still, ectopic pregnancy can also occur in people who have no known risk factors.
In the early stages, ectopic pregnancy may show symptoms similar to a normal pregnancy. Delayed menstruation, a positive pregnancy test, mild nausea, or breast tenderness may be seen. As the condition progresses, symptoms such as one-sided pelvic pain, spotting-like bleeding, shoulder pain, dizziness, or feeling faint may occur.
According to Op. Dr. Feyza Tek, early evaluation is very important in ectopic pregnancy. Checking whether the pregnancy has implanted inside the uterus through early ultrasound and blood tests can help detect possible risks in time.
How Does an Embryo Implant Outside the Uterus?
In a healthy pregnancy, the embryo travels through the fallopian tubes, reaches the uterus, and continues to develop there. In an ectopic pregnancy, this process cannot be completed. Instead of moving into the uterus, the embryo most commonly attaches inside the fallopian tube and begins to grow there.
Since the fallopian tubes are not suitable for the development of a pregnancy, the growing pregnancy tissue gradually begins to put pressure on the surrounding tissues. Over time, this may cause pain, bleeding, and in advanced cases, rupture of the tube. In some patients, an ectopic pregnancy is detected very early, while in others, symptoms become more noticeable in the following weeks.
Infections, adhesions, or previous surgeries that affect the structure of the tubes may disrupt the embryo’s movement. Smoking may also affect the mobility of the fallopian tubes and increase the risk of ectopic pregnancy.
In some women, an ectopic pregnancy may initially present only with mild spotting, menstrual-like pain, or short-term tenderness in the pelvic area. Mild symptoms may cause the condition to be underestimated. However, if pain, bleeding, or one-sided pelvic discomfort occurs while the pregnancy test is positive, an early ultrasound evaluation is important for detecting possible risks in time.
What Conditions Increase the Risk of Ectopic Pregnancy?
Ectopic pregnancy can sometimes occur without any clear cause. However, some health problems and medical history factors may increase the risk. Conditions that affect the fallopian tubes are especially evaluated carefully in terms of ectopic pregnancy.
Previous pelvic infections may damage the tubes and make it difficult for the embryo to reach the uterus. Similarly, having undergone surgery involving the tubes or operations that may cause adhesions in the abdomen are also among the risk factors.
People who have had an ectopic pregnancy before have a higher chance of experiencing it again compared to the general population. Therefore, early ultrasound control is recommended when a new pregnancy occurs.
Endometriosis is one of the important gynecological conditions that can affect the structure of the tubes. In addition, people undergoing IVF treatment should also be carefully monitored for the location of the pregnancy. Although the embryo is transferred into the uterus, ectopic pregnancy may rarely occur.
Advanced age, smoking, and congenital structural problems in the tubes may also be considered risk factors. However, it should not be forgotten that ectopic pregnancy can also occur in women who have no risk factors.
What Symptoms Can Ectopic Pregnancy Cause?
Symptoms of ectopic pregnancy may vary from person to person. While some patients experience mild complaints, others may suddenly develop serious symptoms. For this reason, early signs should be evaluated carefully.
Delayed menstruation and a positive pregnancy test are usually among the first findings. Mild pelvic pain, breast tenderness, or nausea may also occur. Since these symptoms are similar to a normal pregnancy, ectopic pregnancy may not be noticed at first.
Over time, one-sided pelvic pain may become more noticeable. Spotting-like vaginal bleeding, a feeling of pressure in the lower abdomen, or pain that increases with movement may be seen. Some women feel the pain only on the right or left side.
In advanced cases, shoulder pain, sudden severe abdominal pain, low blood pressure, dizziness, and feeling faint may occur. This picture may be a sign of internal bleeding and requires urgent medical evaluation.
If pain and bleeding occur together in someone with a positive pregnancy test, it is important to consult an obstetrician and gynecologist without delay.
How Is Ectopic Pregnancy Diagnosed?
The two most important evaluations in the diagnosis of ectopic pregnancy are ultrasound examination and beta hCG monitoring. The diagnosis process is shaped by evaluating these findings together with the patient’s symptoms.
With transvaginal ultrasound, the doctor checks whether the gestational sac is visible inside the uterus. At the same time, the presence of any suspicious appearance in the tubes and any fluid accumulation in the abdomen are evaluated.
In a normal pregnancy, the beta hCG hormone rises in a certain pattern. In ectopic pregnancy, however, this hormone may not increase as expected. For this reason, repeat blood tests may be requested a few days apart.
Since some pregnancies are at a very early stage, it may not be possible to make a definitive diagnosis at the first examination. In such cases, close follow-up is planned and ultrasound is repeated.
Thanks to early diagnosis, it may be possible to prevent risks such as tube rupture and serious internal bleeding. Especially in people with a positive pregnancy test, evaluation should not be delayed if there is pain or bleeding.
How Is Ectopic Pregnancy Treated?
Treatment of ectopic pregnancy is planned according to the patient’s general condition, the location of the pregnancy, and whether there is internal bleeding. The same treatment method is not applied to every patient.
In some ectopic pregnancies detected at an early stage, medication may be preferred. In this method, special drugs are used to stop the growth of the pregnancy tissue, and beta hCG levels are monitored regularly.
In patients with severe pain, internal bleeding, or a risk of tube rupture, surgical treatment may be required. Today, many operations are performed laparoscopically, meaning with a minimally invasive closed technique.
After treatment, it is important for beta hCG levels to return completely to normal. During this process, the patient should not miss follow-up appointments.
Having had an ectopic pregnancy before does not mean that a healthy pregnancy cannot occur in the future. However, early ultrasound control is very important in subsequent pregnancies.