Men, monthly periods

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Hi All, Since CR lowers sex hormones, we may want to consider this attached

abstract when testing is done.

Cheers, Al.

Alan Pater, Ph.D.; Faculty of Medicine; Memorial University; St. 's, NF

A1B 3V6 Canada; Tel. No.: (709) 777-6488; Fax No.: (709) 777-7010; email:

apater@...

Alan Pater, Ph.D.; Faculty of Medicine; Memorial University; St. 's, NF

A1B 3V6 Canada; Tel. No.: (709) 777-6488; Fax No.: (709) 777-7010; email:

apater@...

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Hormones

and

Behavior

Vol. 42,

No. 2,

September

[Journal Home Page] 2002 [Click here for information on The

Parathyroids, 2nd Edition from Academic Press]

ISSN:

0018-506X

EISSN:

1095-6867

SELECT:

Table of Contents • Article(PDF) • References

Monthly Patterns of Testosterone and Behavior in Prospective Fathers

[image]

pp. 172-181 (doi:10.1006/hbeh.2002.1815)

Katharina Hirschenhauser*, 1, Didone

Search for Articles by:

Frigerio[image], Karl * Hirschenhauser, K [iDEAL]

Grammer[image], Magnus S. Magnusson§ * Frigerio, D [iDEAL]

* Grammer, K [iDEAL]

* Magnusson, MS [iDEAL]

*Instituto Superior de Psicología

Aplicada, Unidade de Investigação em

Eco-Etología, Lisbon, Portugal

[image]Konrad Lorenz Forschungsstelle

für Ethologie, Grünau, Austria

[image]Ludwig Boltzmann Institute for

Urban Ethology, Vienna, Austria

§Human Behavior Laboratory,

University of Iceland, Reykjavik,

Iceland

(Received August 10, 2001; received in revised form December 2, 2001;

accepted February 12, 2002; published electronically September 24,

2002)

Abstract

The individual time patterns of salivary testosterone of adult

healthy men, self-reported sexual behavior and their co-occurrence

with regular weekly or monthly intervals were studied. Twenty-seven

volunteer males (mean age 33 ± 1 years) collected daily morning

saliva over a period of 90 days. Evening questionnaires provided

daily information on sexual activity. From the saliva, testosterone

immunoreactive substances were determined using enzyme immunoassay.

To detect events in which increases of testosterone were associated

with sexual activity and at the same time controlling for regular

internal patterns in men, data were analyzed using Theme software.

First results indicated a varying number of complex nonrandom

interaction patterns of testosterone with sexual activity, but also

with weekly (i.e., Saturdays) and monthly intervals (i.e., 28-day

full-moon intervals). The social context of the occurrence of

specific pattern combinations was elaborated using parameters from

the men's self-reported general life history profiles. Peak hormone

levels occurred around weekends in the majority of the males. The

28-day monthly interval coincided with testosterone peaks only in

those of the paired men who reported a current wish for children

( " prospective fathers " ), but not in unpaired men or in those who did

not wish to have children with their current partner. Rather than

representing a direct regular pattern of the male testosterone per

se, the observed patterns suggest that men have the facultative

potential to adjust their testosterone responses to their female

partner's cycle. In line with the interactions between behavior and

androgens observed in vertebrates in general, this study adds an

example of the mutual character of hormone-behavior interactions and,

thus, for the social context of testosterone patterns in human males.

© 2002 Elsevier Science (USA).

Key Words: testosterone; sexual behavior; hormone behavior

interaction; pair bond; human males; real-time patterns; Theme

1To whom correspondence should be addressed at Unidade de Investiga ç

ã o em Eco-Etologia, ISPA, Rua Jardim do Tabaco 34, 1149-041 Lisbon,

Portugal. E-mail: katarina@... .

Table of Contents • Article(PDF) • References

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