Twins: And What They Tell Us About Who We Are by Lawrence Wright

Author:Lawrence Wright [Wright, Lawrence]
Language: eng
Format: epub
Tags: Family & Relationships, Siblings, Science, Life Sciences, Genetics & Genomics, test
ISBN: 9780471296447
Google: RzaFPgAACAAJ
Amazon: 0471296449
Publisher: Wiley
Published: 1999-01-26T16:00:00+00:00

Twinning has also been shown to be genetically influenced and carried through the maternal line, although in several families the trait appears to have been passed along through the father's genes as well (this point is still hotly disputed, however, like so much of twin research). Tall, heavy women give birth to twins more often than short, thin women, perhaps because they are better nourished. Older women are far more

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likely to conceive twins than are younger women, probably due to higher rates of FSH secretion. The twinning rate begins to fall after age thirty-seven, which may be the result of the increased likelihood of spontaneous abortions.

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