Age at menarche and prevalence of oligo/amenorrhea in top Polish athletes

Article Abstract:

The impact of sports training on the menstrual cycles of female athletes is affected by the age that training commenced and possibly the choice of sport. Female athletes who began training prior to the onset of menarche were more likely to experience oligo/amenorrhea, or nine or fewer cycles per year, than those who began after menarche. Sports selection may also be a factor, as premenarche athletes tend to participate in different sports than postmenarche athletes.

Women's sports

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The second to fourth digit ratio in elite and non-elite female athletes

Article Abstract:

A study to test the hypothesis that women engaged in sports are exposed to high androgen levels in utero is conducted. It is concluded that elite female athletes have significantly lower left hand second to fourth digits ratio (2D:4D) ratios compared to the non-elite as well as the sedentary controls and, therefore, it is speculated that low 2D:4D ratio is a positive correlate of sport potential in females.

United States, Androgens

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Influence of family size and birth order on menarcheal age of girls from Bilbao City (Biscay, Basque Country)

Article Abstract:

Age at menarche has been examined in relation to family size and birth order in a sample of 895 girls from Bilbao, Spain, in the Basque region. Earlier menarche is associated with families of one child or four or more children, and with birth order of first or last, while the latest mean age of menarche occurs in girls of third birth order or those in families with three children.

Spain, Statistical Data Included, Demographic aspects, Family size, Birth order, Bilbao, Spain, Basques, Girls, Basques in Spain

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