The composition and volume of saliva change during pregnancy. You may notice that your saliva tastes different and that there is more of it. Some women experience an annoying relationship between morning sickness and saliva production. For some, the increase in saliva triggers the nausea; for others, the nausea triggers the saliva. This excess salivation usually subsides by the end of the third month. If the taste bothers you, try sucking on a mint.