Twin Zygosity Testing

Twin zygosity testing is a type of DNA testing that determines if twins are identical or fraternal. It is a simple and painless procedure that costs right around $100. So, let's talk about how and why it's done...

How Twin DNA Collection is Done

If you would like to have this test done, you must first order a Twin Zygosity Test Kit. Kits are available through several reputable companies on the web which allow you to purchase online, by mail, or over the phone for added convenience. The test will be mailed to you and will include two separate collection swabs and envelopes (one for each twin). Detailed, easy-to-follow instructions will also be included.

Basically, you use the swab inside the mouth on the inner cheek to collect cell samples. This is completely painless and very easy to do (I am speaking from personal experience with my own twins!). When finished, the swab is then placed inside an envelope labeled with that particular twin's name.

When the process is completed with both twins, the package will need to be sent back to the testing company for analysis. A box or envelope in which to dispatch the samples is usually included in the kit.

As far as when to expect results, each company will be a little different. Generally, results can be obtained within a couple of weeks. However, with advancements in technology, it's sometimes only a couple of days.  That's especially helpful for those parents that just can't stand the anticipation!

Additionally, there may be a few different options on how you receive the results. Most will offer result reports via e-mail, over the phone, or directly through the mail.

Why Bother With Twin Zygosity Testing?

Twin DNA Testing is done for different reasons. Because identical twins share the same DNA, it is a good thing to be sure of for health reasons. For example, both twins may be susceptible to the same diseases. Due to the constant questions parents get about their twins being either "identical" or "fraternal", many of the unsure will resort to zygosity testing for a definite answer to give family, friends, and those pesky strangers. And, of course, there are those who pursue a DNA test out of pure curiosity. In any case, with the technology we have today, these tests are more than 99.9% accurate. That should put to rest any questions!

› Twin Zygosity Testing

Comments or Questions?

Join the conversation. We love to hear from our readers!

Read more on Zygosity Testing...

Recent Articles

  1. Baby Gifts for Twins - Unique ideas, where to buy, price guide

    Feb 23, 17 08:41 PM

    Looking for baby gifts for twins? Check out these unique finds! Twin gift baskets, twin baby gift sets, twin baby shower gifts, and more.

    Read More

  2. Twin Stroller Guide - What to consider and top models

    Feb 18, 17 12:26 PM

    Comprehensive twin stroller guide to find the one that will best suit your needs and twins. Tandem, side-by-side, twin jogging strollers and double prams are all covered..

    Read More

  3. The Burnout Twin Mom and Her Childcare Choices

    Feb 17, 17 03:13 PM

    The burnout twin mom and her childcare choices when faced with having another set of twins is daunting...Read more...

    Read More