Differential twin mortality indicates a correlation between age and parental effort in humans.
Voland
E
E
Dept. of Anthropology, University College London, UK.
Gabler
S
S
D000328:Adult; D005260:Female; D006801:Humans; D008423:Maternal Age; D008425:Maternal Behavior; D008875:Middle Aged; D009026:Mortality; D018566:Pregnancy, High-Risk; D012044:Regression Analysis; D014427:Twins