Morning sickness: a mechanism for protecting mother and embryo

Quarterly Review of Biology Vol/Iss. 75(2) University of Chicago Press Published In Pages: 113-148
By Flaxman, Samuel M., Sherman, Paul W.


Societies in which morning sickness was not observed will be significantly more likely to have (i) only plants as a food staple, (ii) corn as a staple, and (iii) corn as the only staple than societies in which morning sickness was observed (129).


Test NameSupportSignificanceCoefficientTail
G-testSupportedP < 0.05 (plants as staples); P < 0.005 (corn as a staple); P < 0.005 (corn as the only staple)UNKNOWNUNKNOWN


Variable NameVariable Type OCM Term(s)
Morning SicknessDependentPregnancy
Plants as Dietary StapleIndependentDiet
Only Corn as Dietary StapleIndependentDiet
Corn as Dietary StapleIndependentDiet