Delaney A. Knorr · 16 November 2023
Grandmothers often help the mother-child dyad, but when does this help start? In our lives, we may see many people increase helping behaviors towards a close friend or family member when she has a child to offset her increasing needs. From an evolutionary perspective, these kin and non-kin helpers (or ‘allomothers’) buffer maternal workloads to increase the health and survival of the mother-child dyad. One critical category of allomother that has been studied extensively is grandmothers because of their child-care expertise as well as their often close geographic proximity and emotional connections to the dyad. Much of the research has focused on this allomaternal help at weaning, or more generally, after the child is born. However, given recent evidence that maternal conditions during pregnancy can alter birth outcomes and increase the risk of postnatal morbidities, more evolutionary research is needed to explore prenatal allomaternal effects.