What is discriminatory zone in pregnancy?
The discriminatory zone is the range of serum β-hCG concentrations above which a gestational sac can be visualized consistently. 11 Abdominal ultrasonography should consistently detect the gestational sac when the 3 -hCG level is greater than 6,500 mIU per mL (6,500 IU per L).
What is the discriminatory zone for ß hCG levels when using transvaginal ultrasound?
Often used in the evaluation of early pregnancy, the hCG discriminatory zone is based on the assumption that a serum ß-hCG level exceeding 1,000–2,000 mIU/mL in a woman who has a normal intrauterine pregnancy should be accompanied by a gestational sac that is visible via transvaginal US.
What is the discriminatory zone for ectopic?
The discriminatory zone is the serum hCG level above which a gestational sac should almost always be visualized on ultrasound when an IUP is present.
What is discriminatory value?
The discriminatory value is that level of hCG above which all normal intrauterine pregnancies should be seen. This level has become progressively more important with the increased adoption of medical management of ectopic pregnancy.
What are hCG levels in pregnancy?
An hCG level of less than 5 mIU/mL is considered negative for pregnancy, and anything above 25 mIU/mL is considered positive for pregnancy. An hCG level between 6 and 24 mIU/mL is considered a grey area, and you’ll likely need to be retested to see if your levels rise to confirm a pregnancy.
What hCG level is heartbeat visible?
Every patient with an HCG level greater than 10,800 mIU/ml had a visible embryo with a heartbeat.
Would hCG levels double if it was ectopic?
In an uncomplicated, early pregnancy, hCG levels typically double every couple of days. The hCG levels in an ectopic pregnancy often rise slower than usual, meaning they will not double every two to three days in early pregnancy.
Can ultrasound detect ectopic pregnancy?
Most ectopic pregnancies can be detected using a pelvic exam, ultrasound, and blood tests.
What is a normal hCG level for 8 weeks pregnant?
Standard hCG levels
| Pregnancy week | Standard hCG range |
|---|---|
| 5 weeks | 18–7,340 mIU/mL |
| 6 weeks | 1,080–56,500 mIU/mL |
| 7–8 weeks | 7,650–229,000 mIU/mL |
| 9–12 weeks | 25,700–288,000 mIU/mL |
What is the gold standard for diagnosing ectopic pregnancy?
There is more and more evidence to support the use of transvaginal ultrasound as the primary diagnostic tool for ectopic pregnancy. In this review we hoped to demonstrate that transvaginal ultrasound is the new gold standard for the diagnosis of ectopic pregnancy.
What should be the discriminatory threshold for ectopic pregnancy?
As equipment improved the general consensus was that the discriminatory level was between 1000 and 1500 mIU/mL in most centers. This level has become progressively more important with the increased adoption of medical management of ectopic pregnancy.
What is the discriminatory value of hCG in ultrasound?
The discriminatory value is that level of hCG above which all normal intrauterine pregnancies should be seen. An early study, using transabdominal ultrasound, advocated a level of 6500 mIU/mL [ 2 ].
Why is an ultrasound not visualized in early pregnancy?
One reason a pregnancy is not visualized is that the ultrasound was performed too early and the gestational sac has not yet developed. To address this issue, we use the concept of a discriminatory zone (12, 13).
What is the discriminatory value of early gestational sac?
Early gestational sac with hCG = 420 mIU/mL Discriminatory Value The discriminatory value is that level of hCG above which all normal intrauterine pregnancies should be seen. An early study, using transabdominal ultrasound, advocated a level of 6500 mIU/mL [2].