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  • Title: Allogeneic matings and immunization have different effects on nulliparous and multiparous mice.
    Author: Chavez DJ, McIntyre JA, Colliver JA, Faulk WP.
    Journal: J Immunol; 1987 Jul 01; 139(1):85-8. PubMed ID: 3584989.
    Abstract:
    CBA/J female mice have a high rate of spontaneous fetal loss when mated with DBA/2 males. We have confirmed that this fetal resorption rate can be significantly reduced by immunizing the female with C57BL rather than DBA leukocytes. The current studies have been extended to show the effect of continued immunization into second pregnancies. Three new findings emerge: second pregnancies in unimmunized CBA/J females X DBA/2 males proceed with a low percentage of spontaneous resorptions; continued immunization of multigravid, multiparous mice is associated with a high percentage of late onset fetal resorptions; and comparison of sex ratios between treated and untreated pregnancies showed no significant shift. These results suggest that untreated CBA/J females mated to DBA/2 males can be immunized to trophoblast antigens during first pregnancies, and that such immunization leads to "normal" reproductive outcome in subsequent untreated pregnancies. Persistent immunization with leukocytes appears to increase the percentage of fetal wastage in subsequent pregnancies regardless of whether the mother receives paternal or nonpaternal leukocytes. Intentional chronic immunization with male leukocytes does not influence the sex ratio of viable offspring. These data are discussed with reference to immunotherapy for women who suffer unexplained, recurrent spontaneous abortions.
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