Questionnaire data of 704 women of postreproductive age were used in this study. Questionnaire involved 462 Kalmyks, 119 Russians, 43 Kazakhs, 52 representatives of Northern Caucasus ethnic groups and, 28 other ethnic groups. The average number of pregnancies in Kalmyks was 5.49; the average number of live births was 3.21. The Crow index for Kalmyks was I(m) = 0.038, I(f) = 0.300, I(tot) = 0.350; and for Russians in Kalmykia, I(m) = 0.030, I(f) = 0.264, I(tot) = 0.302.