Birth risks of Swedish you to definitely-boy parents, by the gender of one’s basic boy, 1970–2012 (risks in line with you to-daughter parents in 1977)
Figures for a couple of-son moms and dads get when you look at the Fig. 2 and delivery dangers are conveyed about the new delivery rate out-of mothers of one son and another lady into the 1977. The results demonstrate that on the entire period between 1970 and you may 2012 the individuals mothers that has a child and a son consistently exhibited down birth pricing compared to the moms and dads that has both several sons or several daughters. Furthermore, till the mid-mid-eighties, with several sons or a few daughters did not appear to gamble a life threatening character about couples’ decision getting a third boy.