constituent of foetal serum, but it virtually disappears from the circulation very soon after birth and is not detectable in normal adults. The only conditions where cx1FP has been found in the sera of adult humans in significant quantities are primary hepatocellular cancer of the liver and teratocarcinomas. It has been shown that the demonstration of x1FP in the serum of adult patients can be ...

The maternal immune hypothesis (MIH) argues same sex attraction (SSA) results from maternal immune attack on fetal male-specific brain structures and involves the previous biological influence of elder brothers. One of the surveys supporting this is shown to be based on an unsuitable sample and to contain some strong contrary evidence. The hypothesis relies on at least four speculative ideas an...