There is growing evidence in literature that the prenatal environment has significant influence on one’s sexual orientation. One of the most influential theory is the gestational neurohormonal theory proposed by Ellis and Ames (1987). The comprehensive theory proposed that the level of testosterone, estradiol and other certain sex hormones that the nervous system is exposed to while neuro-organization is taking place during gestation determines one’s sexual orientation (Ellis & Ames, 1987). A more recent study showed that prenatal stress significantly increase the chance of homosexual and bisexual male offspring through affecting the level of hormone that the foetus is exposed to (Ellis & Cole-Harding, 2001). Maternal stress appeared to trigger
