Vaccination against spontaneous abortion in mice.

We report here that the high rate of spontaneous resorption observed in CBA/J female mice mated with DBA/2 J males can be dramatically reduced by vaccination with Balb/c male spleen cells, but not by CBA/J or DBA/2 J male spleen cells. This effect correlates with the differential ability of Balb/c spleen cells to induce MLR suppressor activity in CBA/J female mice, and should lead to a better understanding of the immunology of the materno-fetal relationship.