The test for compatibility

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Anna - - ---Hello, my question consists in the following. At me was 2 not developing pregnancy. After last has passed or has taken place 2 years. During treatment to me postavidi DVS a syndrome, have treated and have sent to become pregnant. Now suggest to make the test for immunologic compatibility. And so, I would like to ask, how much or as far as it is expedient. In fact I became pregnant 2 times? In advance thanks.