Multiple births are a great addition to research addressing genetic and environmental influences on behavior. It occurred to me that the new octuplets offer some amazing possibilities: The eight babies include:

28 twin pairs

56 triplet sets

70 quadruplet sets

56 quintuplet sets

29 sextuplet sets

8 septuplet sets

They also offer an amazing array of identical and fraternal pairs, as well as same-sex and opposite-sex sets.

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Tags: array, babies, environmental influences, multiple births, octuplets, possibilities, quadruplet, quintuplet, septuplet, sextuplet, triplet, triplets, twin pairs, twins