can an ectopic pregnancy not show up on a pregnancy test?
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A urine pregnancy test—including a home pregnancy test—can accurately diagnose a pregnancy but cannot detect whether it is an ectopic pregnancy. If a urine pregnancy test confirms pregnancy and an ectopic pregnancy is suspected, further blood testing or ultrasound is needed to diagnose an ectopic pregnancy.
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You may not notice any symptoms at first. However, some women who have an ectopic pregnancy have the usual early signs or symptoms of pregnancy — a missed period, breast tenderness and nausea.
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Approximately 1% of ectopic pregnancies will have a negative urine pregnancy test and a β-hCG level of less than 20 mIU/mL. The emergency physician must remain cognizant of this potential diagnosis in the setting of unexplained intraabdominal hemorrhage or severe pelvic pain with a negative urine pregnancy test [2, 4].
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Since 1987, eight cases of ruptured ectopic pregnancy have been reported with a negative urine pregnancy test. These patients were taken to the operating room for suspected hemoperitoneum (5). These cases and ours suggest that ectopic pregnancy should be considered even with a negative pregnancy test.
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If you have had your tubes tied and you are getting a positive urine pregnancy test at home, it is very important that you see your doctor to first confirm that you are in fact pregnant, and second, to make sure you don't have an ectopic pregnancy.
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First signs of an ectopic pregnancy may include: Vaginal bleeding, which may be light. Abdominal (belly) pain or pelvic pain, usually 6 to 8 weeks after a missed period.
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You may not notice any symptoms at first. However, some women who have an ectopic pregnancy have the usual early signs or symptoms of pregnancy — a missed period, breast tenderness and nausea. If you take a pregnancy test, the result will be positive.
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If you are testing before the date of your expected period, you may be pregnant but your hCG levels are too low for the test to detect. A test may show positive if you have a chemical pregnancy (early pregnancy loss), an ectopic pregnancy, or a molar pregnancy, but this is not a false positive.
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Sonography is the modality of choice for diagnosis of ectopic tubal pregnancy. Ectopic pregnancy is considered when there are no normal uterine pregnancy findings on sonography (5). As pregnant women should not undergo CT imaging, CT findings of ectopic pregnancy are not well known.
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They'll offer you a pregnancy test. If your pregnancy test is negative, it's unlikely that your symptoms are being caused by an ectopic pregnancy. If your pregnancy test is positive or your symptoms strongly suggest you have an ectopic pregnancy, your GP may refer you to a hospital specialist.
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It can take a few weeks or sometimes months for this to happen. About half of ectopic pregnancies may resolve on their own where there is a drop in hCG levels. If a person develops new symptoms, another ultrasound scan may be done, and treatment options will be reassessed.
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— Ectopic pregnancy is diagnosed if the ultrasound detects a fetal heart beat or an embryo that is outside of the uterus.
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Symptoms of an ectopic pregnancy An ectopic pregnancy doesn't always cause symptoms and may only be detected during a routine pregnancy scan. If you do have symptoms, they tend to develop between the 4th and 12th week of pregnancy. Symptoms can include a combination of: a missed period and other signs of pregnancy.
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If you're approved to get an ultrasound despite a negative pregnancy test, it's possible a pregnancy won't show up in the first trimester because of: an irregularity in where the embryo is implanted. the way your uterus is shaped.
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It is possible to have an ectopic pregnancy without experiencing any symptoms until rupture of the fallopian tube or close organs. After rupture, signs and symptoms may include: Severe stomach pain.
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According to the literature, a negative pregnancy test via urine or low β-hCG in serum of pregnant women is 3.1% and 2.6% respectively in ectopic pregnancies8-10. In addition, more than 1% of ectopic pregnancies are associated with undetectable levels of β-hCG.
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However, the fact that you may experience normal pregnancy symptoms, such as nausea, painful breasts or a swollen abdomen but no bleeding or pain, does not completely rule out an ectopic pregnancy, although this is rare.