Smoking while pregnant can lead to a woman giving birth to a gay child, a scientist has claimed.
Dick Swaab, professor of neurobiology at Amsterdam Biology, claims a woman’s lifestyle while pregnant can have an impact on the development of their babies.
He suggested if they live a stressful life, take drugs, drink or smoke can lower a child’s IQ and ‘influence’ the sexuality.
‘Pre-birth exposure to both nicotine and amphetamines increases the chance of lesbian daughters,’ Swaab told the Sunday Times.
‘Pregnant women suffering from stress are also more likely to have homosexual children of both genders because their raised level of the stress hormone cortisol affects the production of foetal sex hormones.’
He said the brain in foetuses begins to develop at two weeks, with anything introducing toxins into the body having an impact on this development.
Swaab also claims: ‘The more older brothers a boy has, the greater the chance that he will be homosexual.
‘This is due to a mother’s immune response to male substances produced by boy babies in the womb, a response that becomes stronger with each pregnancy.’