What a great discussion. But could it have been what the parent are exposed to during the pregnancy that is causing the abnormal gene(the aetiology) or lack of oxygen at birth and the chemicals.
If its the abnormal gene, could it have been inherited from one of the parent or maybe any of the ancestor have the gene. I know gene are known to be inherited from one generation to the other.
Also concerning the chemical, are there no precise chemicals?( responsible for the defect). Just like the way serotonin causes infertility..if there is one feel free to share......
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