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In the womb, my twins had two sacks, but only one placenta, so the doctors said they could either be identical or fraternal. And when they were born, they looked pretty much identical except Macy had bigger feet! But as they grow, we know they are nowhere near identical! But if you are unsure of whether your twins are fraternal or identical, Genetree offers a Twin Zygosity DNA test. You simply order a test kit, take a cheek cell swab of each twin, send in sample and they notify you quickly with the results. Visit Genetree.com for more info.