PMID |
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TITLE |
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Males do not reduce the fitness of their female co-twins in contemporary samples. |
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ABSTRACT |
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Lummaa et al. (2007) presented historical data collected from twins born in Finland between 1734 and 1888 which suggested that females (N = 31) born as part of an opposite sex (OS) twin pair were 25% less likely to reproduce than female twins (N = 35) born as part of a same sex (SS) pair. They hypothesized that this reduction in fitness was due to masculinization of the female fetus via prenatal effects of the hormones of a male fetus. Because such masculinization would presumably take place in modern populations as well, it would seem important to establish to what degree it does so, and if so, whether reproduction is affected. We therefore address the question of reproduction differences in individual female twins from same-sex (N = 1979) and opposite-sex (N = 913) dizygotic pairs in studies carried out in Australia, the Netherlands, and the United States. In all three samples, there were no differences in the number of children or age of first pregnancies in women from same sex pairs compared to those from opposite sex pairs. Similarly, there were no differences in psychological femininity between women from pairs of the same or opposite sex. |
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DATE PUBLISHED |
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HISTORY |
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PUBSTATUS |
PUBSTATUSDATE |
pubmed |
2008/10/03 09:00 |
medline |
2009/08/27 09:00 |
entrez |
2008/10/03 09:00 |
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AUTHORS |
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NAME |
COLLECTIVENAME |
LASTNAME |
FORENAME |
INITIALS |
AFFILIATION |
AFFILIATIONINFO |
Medland SE |
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Medland |
Sarah E |
SE |
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Genetic Epidemiology Unit, Queensland Institute of Medical Research, Australia. sarahMe@qimr.edu.au |
Loehlin JC |
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Loehlin |
John C |
JC |
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Willemsen G |
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Willemsen |
Gonneke |
G |
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Hatemi PK |
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Hatemi |
Peter K |
PK |
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Keller MC |
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Keller |
Mathew C |
MC |
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Boomsma DI |
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Boomsma |
Dorret I |
DI |
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Eaves LJ |
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Eaves |
Lindon J |
LJ |
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Martin NG |
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Martin |
Nicholas G |
NG |
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INVESTIGATORS |
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JOURNAL |
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VOLUME: 11 |
ISSUE: 5 |
TITLE: Twin research and human genetics : the official journal of the International Society for Twin Studies |
ISOABBREVIATION: Twin Res Hum Genet |
YEAR: 2008 |
MONTH: Oct |
DAY: |
MEDLINEDATE: |
SEASON: |
CITEDMEDIUM: Print |
ISSN: 1832-4274 |
ISSNTYPE: Print |
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MEDLINE JOURNAL |
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MEDLINETA: Twin Res Hum Genet |
COUNTRY: England |
ISSNLINKING: 1832-4274 |
NLMUNIQUEID: 101244624 |
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PUBLICATION TYPE |
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PUBLICATIONTYPE TEXT |
Journal Article |
Research Support, N.I.H., Extramural |
Research Support, Non-U.S. Gov't |
Twin Study |
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COMMENTS AND CORRECTIONS |
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REFTYPE |
REFSOURCE |
REFPMID |
NOTE |
Cites |
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Cites |
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12009048 |
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GRANTS |
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GRANTID |
AGENCY |
COUNTRY |
P50 AA011998 |
NIAAA NIH HHS |
United States |
R01 AA007728 |
NIAAA NIH HHS |
United States |
DA12854 |
NIDA NIH HHS |
United States |
T32 MH020030 |
NIMH NIH HHS |
United States |
R56 DA012854 |
NIDA NIH HHS |
United States |
AA06781 |
NIAAA NIH HHS |
United States |
MH40828 |
NIMH NIH HHS |
United States |
R01 MH068521 |
NIMH NIH HHS |
United States |
R01 AA006781 |
NIAAA NIH HHS |
United States |
MH068521 |
NIMH NIH HHS |
United States |
AA07728 |
NIAAA NIH HHS |
United States |
AA11998 |
NIAAA NIH HHS |
United States |
R01 DA012854 |
NIDA NIH HHS |
United States |
R01 AA010249 |
NIAAA NIH HHS |
United States |
R37 AA007728 |
NIAAA NIH HHS |
United States |
R01 MH040828 |
NIMH NIH HHS |
United States |
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GENERAL NOTE |
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KEYWORDS |
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MESH HEADINGS |
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DESCRIPTORNAME |
QUALIFIERNAME |
Aged |
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Aged, 80 and over |
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Australia |
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Female |
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Fertility |
physiology |
Humans |
physiology |
Male |
physiology |
Middle Aged |
physiology |
Netherlands |
physiology |
Reproduction |
physiology |
Sex Characteristics |
physiology |
Twins, Dizygotic |
psychology |
Twins, Monozygotic |
psychology |
United States |
psychology |
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SUPPLEMENTARY MESH |
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GENE SYMBOLS |
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CHEMICALS |
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OTHER ID's |
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