Drinking plenty of water acts much the same way that taking guaifenesin does. Guaifenesin is sometimes taken by women who are trying to conceive in order to help their cervical fluid to be thinner and more abundant. Another good reason to drink a lot of water while trying to conceive is because of its benefits to pregnancy. Since you would not know you were pregnant for about 2 weeks, it's a good idea to already be in the habit of guzzling water. It prevents dehydration.
Dehydration is one of the leading causes of preterm labor.
This is because dehydration causes contractions which leads to true labor. With this in mind, plan on consuming 8 to 10 cups of water a day in preparation for pregnancy and for your own good health. As your body gets used to the water the trips will be lessened somewhat. You can substitute fruit juices for some of your cups of water. If you absolutely can't stand the taste of water, try squeezing a wedge of lemon or lime for flavor.