I would like to know the research behind the theory of birth defects resulting from Type A fathers and Type O mothers as stated in Eat Right 4 Your Type.
I encourage you to explore the 'Knowledge Bases' which are now available from the front homepage. There is an extensive article by the researcher AE Mourant that I have reproduced under the 'Disease' Knowledge Base that can answer your question.
The Ask Dr. D'Adamo internet advice column ran from 1996 to 2009, at which time Dr. D'Adamo's teaching and programming responsibilities no longer allowed him to
devote time and resources to directly answering visitor questions. However we've recently reorganized this treasure-trove of material and made it again available to his readership. He occasionally posts new entries. These are marked with a NEW tag.
The Membrosia System was developed by Dr. Peter D'Adamo to help achieve the optimal ratio of fatty acids and phospholipids. When taken together, the two components (Membrosia Complex and Membrosia Fluidizer) maintain healthy cell membrane nutrition, helping to support healthy aging and the control of free radicals.