Twin mania: Lindon, Utah, twins pregnant again with 2nd set of twins

Twin sisters Kelli Wall, left, and Kerri Bunker are shown in this undated photo provided by Kerri Bunker. The two women are identical twins who already each have one set of twins. Now, they are getting ready to each have a second set of twins next spring, KSL-TV reports. "To have twins twice is incredible," Wall said. The Lindon women both had their first set of fraternal twins after using in vitro fertilization after they struggled to get pregnant. This summer, both found out they are having twins again. They are both due two weeks apart next spring. (Kerri Bunker via AP) (The Associated Press)

In this undated photo provided by Kerri Bunker shows the pregnancy announcement for twin sisters Kelli Wall and Kerri Bunker. The two women are identical twins who already each have one set of twins. Now, they are getting ready to each have a second set of twins next spring, KSL-TV reports. "To have twins twice is incredible," Wall said. The Lindon women both had their first set of fraternal twins after using in vitro fertilization after they struggled to get pregnant. This summer, both found out they are having twins again. They are both due two weeks apart next spring. (Kerri Bunker via AP) (The Associated Press)

Kerri Bunker and Kelli Wall know a thing or two about twins.

The two women are identical twins who already each have one set of twins. Now, they are getting ready to each have a second set of twins next spring.

KSL-TV reports that the two women found out this summer that they were having twins gain. They are due two weeks apart next spring.

It marked the latest sign that the two women are destined to live similar lives. They are both teachers at the same school, and they married best friends.

Their first sets of twins are similar in age, as well. Bunker's twins, Kole and Hallie, are 3-years-old. Wall's twins, Madison and McKell, are 4-years-old.

Wall considers it a blessing to be a twin because you always have a best friend.

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Information from: KSL-TV, http://www.ksl.com/