According to neuroscientist Dr. Dick Swaab, pre-birth exposure to nicotine can increase the chances of girls becoming lesbian or bisexual. The researcher also surmised that a boy with several older brothers has a higher chance of being gay.
Now add stress to that, as it apparently plays a part in sexual orientation, according to Dr. Swaab.
Swaab contends,“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 fetal sex hormones.”
The good doc says that since fetal brain cells begin to form at two weeks old, any toxins introduced can have an affect on the child. Further, they found that the synthetic drug, estrogen, when ingested by pregnant women during a study between 1939 and 1960 to reduce miscarriage, showed a greater chance of bisexuality and lesbianism in their daughters.
Swaab concludes that even though lifestyle factors play a major role in fetal brain formation, genetics still hold the most weight.
EURThisNThat thanks writer Ruth Manuel-Logan for excerpts in this article.