It is also known that women more than men have the antibody. It is not known why that is. It is also not known why the antibody appears in the first place. Mice models can be used to study the antibody. It is possible to immunize mice to make the antibody.
Some mice develop it spontaneously.
Viruses are given to mice, which forces them to make the antibody. Once mice get the antibody, we can study and measure mice pregnancies. It is more difficult to show that mice develop blood clots. Mice can also be used as models to test our treatment. There are two different theories explaining why people develop the antiphospholipid antibody.