The Sydney Morning Herald reports:
A Danish study of a million women has found a link between the use of hormonal contraception such as the the pill and increased risk of depression.
Compared with non-users, women and teenage girls aged 15 to 34 who used hormonal contraception had a 1.23 times higher risk of being diagnosed with depression, especially adolescents, according to a paper published in the journal JAMA Psychiatry.
Researchers at the University of Copenhagen in Denmark analysed health registry data of one million Danish women from 2000 and followed them up after an average of six years.
Of the 55 per cent of those who used hormonal contraception, there were just over 23,000 first diagnoses of depression at the time of follow up.
More than 133,000 had received their first prescription of antidepressants.
The highest risk of depression was among the adolescent girls, who had a 1.8-times higher risk of first use of an antidepressant.
The risk varied slightly among the…