Ian Sample

thumb| Ian Sample is an English journalist and writer. He is a science editor for The Guardian newspaper. Quotes Genes Influence the Age at Which You Lose Your Virginity (2016) "Genes Influence the Age at Which You Lose Your Virginity, Study Shows", The Guardian (18 April 2016) "We were able to calculate for the first time that there is a heritable component to age at first sex, and the heritability is about 25%, so one quarter nature, three quarters nurture," said John Perry, an expert in reproductive ageing and related health conditions at Cambridge University. The scientists go on to show how early puberty — often brought on by poor nutrition and, as a consequence, childhood obesity — has a small but direct effect on the age at which people lose their virginity, and the age they have their first child. Each of these in turn appeared to reduce the person’s chances of doing well in education. . . . George Davey Smith, a clinical epidemiologist at Bristol University, said: "It suggests that earlier puberty does influence early age of sexual debut, which then appears to have other consequences such as, all things being equal, earlier first birth, having more children, less likely to remain childless, and poorer educational outcomes." While early puberty has been linked to poor educational achievement before, he said, the latest study strengthened the evidence that early puberty was a cause, and not simply a reflection of underlying factors, such as social class. Writing in the journal Nature Genetics, the scientists mention another genetic variant that seemed to link red hair colour and freckled skin with women, but not men, losing their virginity later than others.    Scientists identified the raft of genes from the DNA of more than 125,000 people aged 40 to 69 enrolled on the BioBank project. The most common age for both men and women losing their virginity was 18. Having drawn up the list of 38 gene regions, the team went on to verify their effects in 250,000 other men and women from Iceland and the US. The scientists go on to show how early puberty — often brought on by poor nutrition and, as a consequence, childhood obesity — has a small but direct effect on the age at which people lose their virginity, and the age they have their first child. Each of these in turn appeared to reduce the person’s chances of doing well in education.    "This helps to inform us about future preventative efforts to delay puberty in young children," Perry said. Ewan Birney, co-director of the European Bioinformatics Institute near Cambridge added: "This is an interesting study where using genetics one can better untangle cause and consequence of a complex human behaviour. Genetics only contributes a small part to age of first sexual intercourse, but the very random nature of each person’s genome means it can be used to trace the impact of this behaviour into later life with less concern about complex correlations confusing cause and consequence." External links Q115192000 Category:Living people Category:Journalists from England