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| PMID |
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| TITLE |
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| Genetic and environmental influences on the frequency of orgasm in women. |
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| ABSTRACT |
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| This study reports on genetic and environmental influences on the frequency of orgasm in women during sexual intercourse, during other sexual contact with a partner, and during masturbation. Participants were drawn from the Australian Twin Registry, and recruited from a large, partly longitudinal twin-family study. Three thousand and eighty women responded to the anonymous self-report questionnaire, including 667 complete monozygotic (MZ) pairs and 377 complete dizygotic (DZ) same-sex pairs, 366 women from complete DZ opposite-sex pairs, and 626 women whose co-twins did not participate. Significant twin correlations were found for both MZ and DZ twin pairs for all three items of interest. Age effects were statistically significant for some items. Models incorporating additive genetic, shared and nonshared environmental influences provided the best fit for Items 1 and 3, while a model with additive and nonadditive genetic influences along with nonshared environment fitted the data from Item 2. While an independent pathway model fits the data most par-simoniously, a common pathway model incorporating additive genetic (A), shared environment (C), and unique environment (E) effects cannot be ruled out. Overall, genetic influences account for approximately 31% of the variance of frequency of orgasm during sexual intercourse, 37% of the variance of frequency of orgasm during sexual contact other than during intercourse, and 51% of the variance of frequency of orgasm during masturbation. Following Baker (1996), we speculate that this additive genetic variance might arise from frequency-dependent selection for a variety of female sexual strategies. |
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| DATE PUBLISHED |
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| HISTORY |
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| PUBSTATUS |
PUBSTATUSDATE |
| pubmed |
2005/04/20 09:00 |
| medline |
2005/12/24 09:00 |
| entrez |
2005/04/20 09:00 |
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| AUTHORS |
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| NAME |
COLLECTIVENAME |
LASTNAME |
FORENAME |
INITIALS |
AFFILIATION |
AFFILIATIONINFO |
| Dawood K |
|
Dawood |
Khytam |
K |
|
Department of Psychiatry, University of Chicago, Chicago, Illinois 60637, USA. khytam@uchicago.edu |
| Kirk KM |
|
Kirk |
Katherine M |
KM |
|
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| Bailey JM |
|
Bailey |
J Michael |
JM |
|
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| Andrews PW |
|
Andrews |
Paul W |
PW |
|
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| Martin NG |
|
Martin |
Nicholas G |
NG |
|
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| INVESTIGATORS |
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| JOURNAL |
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| VOLUME: 8 |
| ISSUE: 1 |
| TITLE: Twin research and human genetics : the official journal of the International Society for Twin Studies |
| ISOABBREVIATION: Twin Res Hum Genet |
| YEAR: 2005 |
| MONTH: Feb |
| 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, Non-U.S. Gov't |
| Research Support, U.S. Gov't, P.H.S. |
| Twin Study |
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| COMMENTS AND CORRECTIONS |
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| REFTYPE |
REFSOURCE |
REFPMID |
NOTE |
| CommentIn |
Twin Res Hum Genet. 2006 Aug;9(4):603-8 |
16899171 |
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| GRANTS |
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| GENERAL NOTE |
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| KEYWORDS |
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| MESH HEADINGS |
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| DESCRIPTORNAME |
QUALIFIERNAME |
| Environment |
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| Female |
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| Genetics, Behavioral |
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| Humans |
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| Multivariate Analysis |
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| Orgasm |
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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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