Scientific Research on The Male Biological Clock

• Biological clock ticks for men, too. Genetic defects linked to sperm of older men. PD Thacker 2004, JAMA 

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• Advancing paternal age and the risk of Schizophrenia. D Malaspina et al 2001, Archives of General Psychiatry 

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• Effects of male age on semen quality and fertility. A review of the literature. Kidd et al 2001,Fertility and Sterility 

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• Frequent occurrence of hypogonadotropic hypogonadism in type 2 diabetes. Dhindsa et al 2004 JCEM 

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• Increasing paternal age is associated with delayed conception ia a large population of fertile couples. Evidence for declining fecundity in older men. WCL Ford et al 2000,Human Reproduction 

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• Paternal age and maternal age are risk factors for miscarriage;results of a multicentre European study. Rochebrochard and Thonneau. 2002 Human Reproduction   

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• The influence of paternal age on Down syndrome. Fisch etal 2003, J Urology