Evolution and human behavior • Vol/Iss. 29(1) • Elsevier • • Published In • Pages: 1-18 •
The effect of losing a mother has the strongest effect on child survival rate in very early life (5).
The association between mother's death and child death had been investigated in 28/45 populations. Age of children studied ranged from 0-24 weeks to ~1-15 years. (Hypothesis tested by observing the proportion of previous studies with the hypothesized effect. No formal statistical test)