volume 229, issue 4, P271-278 1980
DOI: 10.1007/bf02108578
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Abstract: The concentration in serum of the pregnancy zone protein (PZ), a high molecular pregnancy-associated alpha 2-glycoprotein, increases during pregnancy, when oral contraceptives are taken and under certain pathological conditions. PZ is probably part of a multifactorial immunological defence system which prevents the premature rejection of the fetus and placenta which together may be regarded as an allograft. Normally, the PZ serum concentration begins to rise during the 6th-12th week of pregnancy and reaches it…

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