Excessive salivation during pregnancy can be related to early pregnancy reactions, which can vary from pregnancy to pregnancy and in degree.
Some pregnant women may exhibit salivation, i.e. excessive saliva production.
Some pregnant women often have acid reflux during pregnancy, when acid reaches the mouth and stimulates the salivary glands in the mouth to secrete saliva.
In addition, salivary secretion naturally increases due to increased metabolism and increased blood volume during pregnancy, which accelerates the secretion of saliva-secreting glands in the mouth.