Size does matter: adolescent build and male reproductive success in the Guangzhou Biobank Cohort Study.
OBJECTIVE
Women usually report attributes of masculinity as attractive. These are attributes are metabolically expensive. We examined the trade off of a key attribute of masculinity, muscularity, proxied by recalled adolescence build, with lifetime reproductive success in the developing country setting of Southern China.


METHODS
We used poisson multivariable regression in 19,168 older (≥ 50 years) Chinese from the Guangzhou Biobank Cohort Study (phases 2 and 3) to examine the sex-stratified, adjusted associations of recalled adolescent relative weight (light (n = 6730), average (n = 9344), and heavy (n = 3094)) with number of offspring.


RESULTS
Among men, recalled heavy adolescent weight compared with light was associated with an incident rate ratio for offspring of 1.08 (95% confidence interval [CI] 1.04-1.13) adjusted for age. This estimate was unchanged by adjustment for life course socio-economic position. There was no such association in women.


CONCLUSIONS
Male physical attractiveness, possibly representing levels of testosterone, was rewarded by lifetime reproductive success, despite potential costs. Socio-economic development may facilitate an inevitable move toward environmentally driven higher levels of testosterone with corresponding public health implications for any conditions or societal attributes driven by testosterone. Further investigation is warranted.
Schooling
C Mary
CM
School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
Jiang
Chaoqiang
C
Zhang
Weisen
W
Lam
Tai Hing
TH
Cheng
Kar Keung
KK
Leung
Gabriel M
GM
D000293:Adolescent; D000368:Aged; D001504:Beauty; D049628:Body Size; D001835:Body Weight; D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D056084:Genetic Fitness; D006801:Humans; D008297:Male; D057228:Masculinity; D008875:Middle Aged; D012098:Reproduction; D013739:Testosterone
D013739:Testosterone