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Do twins run in your family? If you have a mother, brother, sister, uncle or long lost cousin with multiples, you may wonder if you'll have them too. Sometimes twinning is hereditary, it's true. However, only fraternal (dizygotic twins are influenced by heredity, and then only in some cases.
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multiples.about.com/od/funfacts/tp/howtohavetwins.htm
multiples.about.com/od/funfacts/tp/howtohavetwins.htm
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So he may have an ever so slight influence, but on the whole no, the husbands family history has nothing to do with the wife's ability to conceive twins. So, fraternal twinning is influenced by heredity through the mother, since she would have to release two eggs in one cycle.
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www.moondragon.org/obgyn/pregnancy/twins.html
www.moondragon.org/obgyn/pregnancy/twins.html
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Heredity – a woman is more likely to conceive fraternal twins if she is a fraternal twin, has already had fraternal twins, or has siblings who are fraternal...
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www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages...
www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Twins_identical_and_fraternal
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having twins, paternal grandmother, two eggs: There is some new research that claims that there is an enzyme present in some men s sperm that causes the...
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en.allexperts.com/q/Twins-Triplets-2075/NoTwin-Heredity...
en.allexperts.com/q/Twins-Triplets-2075/NoTwin-Heredity-Maternal-side.htm
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Smith's thoroughly documented book questions the pervasive view that human characteristics may be reduced to a simple ratio of heredity and environment. He investigataes the lives of the first recorded conjoined twins, Chang and Eng, and the lives of other, lesser known conjoined twins.
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dx.doi.org/10.1336/0275929655
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Fraternal twins are also the hereditary kind. It is one of the most frequently asked questions of twin parents. Some don't know the family history while...
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www.essortment.com/all/typesoftwins_rgah.htm
www.essortment.com/all/typesoftwins_rgah.htm
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Twins: A Study of Heredity and Environment: By H. H. Newman, F. N. Freeman and K. S. Holzinger. (The University of Chicago Press, 1937. Pp. 369. Price 18 s.
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www.pep-web.org/document.php?id=ijp.019.0267a
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twinstuff.com. Your Source for Information on Twins and Other Multiples on the Web What Are The Chances Of My Having Twins Use these charts for a rough estimate on the chances of having twins or triplets.
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www.twinstuff.com/twinchances.htm
www.twinstuff.com/twinchances.htm
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First Sentence; During the summer months of 1981 the Washington Post published a series of stories about the birth of a set of Siamese twins in Illinois. Read the first page Psychological Profiles of Conjoined Twins: Heredity, Environment and Identity (Hardcover)
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www.amazon.co.uk/exec/obidos/ASIN/0275929655/ref=ase_ww...
www.amazon.co.uk/exec/obidos/ASIN/0275929655/ref=ase_wwwchannel4co-21
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