In toxicity studies with pregnant rats and rabbits, glyphosate caused treatment-related effects such as diarrhoea, reduced weight, nasal discharge and death.

Studies of animals, for example, have shown that when a rat experiences stress during pregnancy, it can cause epigenetic changes in a fetus that lead to behavioral problems as the rodent grows up.

In the experiment, one group of pregnant and lactating rats consumed nutritious rat chow, while another group ate certain human foods high in fat and sugar.