Incidence of Rhesus isoimmunization in Rhesus-negative mothers in Ramadi, Iraq, in the mid-1990s.

This work was carried out in Ramadi, Iraq over the period 1993 to 1997. Of 487 rhesus (Rh)-negative mothers tested and followed up, 172 were primigravida, 1.7% of whom were Rh-isoimmunized. The frequency of isoimmunization increased with increasing number of pregnancies (4.9% for second pregnancies to 45.4% for fifth pregnancies). Comparison of our results with other earlier studies shows that the incidence of Rh-isoimmunization in our study was considerably greater than the others.