Using the search and monitoring system the Social Insurance Fund, the structure was a comparative table of births by birth order in the mother (in percentage).
The table shows that the total birth rate for the second, third and fourth (and subsequent) child in the mother is constantly growing, and for the first — is falling. As a result, the contribution of re-births in the overall birth rate has considerably increased, and the structure of fertility by birth order is comparable to the level of the 80s.
In addition, the rate of the average order of birth (RRR), or the total fertility rate (DAC) for the actual generation of women who, in contrast to conventional DAC for generations of women, shows the actual level of fertility, according to my calculations are estimates exceeded 1.7 children per woman, and the upward trend of this indicator.
PS After a detailed study of birth order on all maternity homes Russian covered by monitoring the Social Insurance Fund, I conclude that the share of the first-born should be a little lower than indicated in the table, because Not all hospital provide information on birth order. All children, whether born in a hospital during a calendar year are automatically considered to be "first."