 Tip of the week: Resellers vs. Laboratories. Why do DNA tests range from $140 to $800? The difference is this: Many online companies are resellers that act as middle-men. They purchase test kits from larger laboratories, and resell them at a higher price to gain a profit. Always ensure that your laboratory is AABB and ISO accredited and has a physical address
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Analysis of the DNA of two separate individuals can provide information as to whether they are full siblings, half siblings, or not related. However, unlike paternity testing which provides very conclusive results: 100% for non-paternity and greater than 99.9% for paternity inclusion, the answers provided by sibship testing are not always so conclusive. The results of the sibling test are for private knowledge only. If you require the sibling test for legal use, you must contact Securigene at 1-877-714-6356 to arrange an appointment for specimen collection at one of our facilities so that the collection procedure is witnessed. Please fully understand the benefits and limitations of the sibship test before ordering. 
About Sibship Testing When the issue of sibship is in question, the recommended method to determine whether individuals are true biological siblings is to test their parents. DNA paternity and sibship testing will provide conclusive results. However, in situations where the alleged parents are unavailable for testing, a DNA sibship test can be performed to analyze the relationship of biological siblings. Unlike a DNA paternity test which will always provide a conclusive result, sibship tests are different. When a sibship test is conducted, the DNA laboratory will determine the genetic profile of the alleged siblings. Based on the type of genetic material inherited by each sibling, a sibship index is determined. If the sibship index is less than 1.00, this indicates non-relatedness. If the sibship index is greater than 1.00, this indicates that the two tested individuals are more likely to be true biological siblings. The higher the value of the sibship index, the greater the likelihood that the two individuals are true biological siblings. To analyze the possibility that the siblings share only one common parent versus two common parents (mother and father), a half sibship index is obtained. The ratio of the half sibship index versus the full sibship index would provide you with an idea of whether the two individuals are more likely to share only one common parent (e.g. mother only) or two common parents (mother and alleged father). Although the sibship test will not provide you with a conclusive answer, it may be able to provide you with an indication of whether you are more likely to be or not to be the true biological sibling of the other tested individual. |