by riehlism (655 Posts), Sat Oct 16, 2010 01:05 pm
As I understand it, there is no proven etiology for preeclampsia and HELLP. So far, there have only been strong correlations based on studies and as we know, correlations don't equate to fact or cause and effect. So one theory is poor implantation that can cause improper development of the blood vessels between mom and baby. The placenta is therefore will have less blood supply. It gets angry and sends off crazy hormomes in mom's body, as a way of demanding more blood (thus the increase in BP).
This hormonal fight between placenta and mom is what they may be considering the immune response.
The typical allergies we have are based on antigen (foreign bodies) vs our immune system.
There is also a theory (which may be related to the above scenario), that as the placenta starts to change it's relationship with mom and sending off "bad" hormones, mom thinks this is an antigen and the war begins.
Again, this is my understanding of the whole thing.