So I've already gone into detail about how cervical fluid is totally normal and how you have different kinds, but what does it all mean in relation to your fertility?
As a general rule, you are most fertile on the last day of egg white cervical fluid (this is the day before or the day you ovulate). This wetness provides nutrients for the sperm to survive, and also makes it easy for those little guys to swim to your fallopian tubes and find your egg. This doesn't mean you are only fertile for one day though. Remember that an egg can live up to 24 hours, and more than one egg can be released during the time of ovulation. Also, sperm can survive inside a woman for up to five days. So to be safe, it's best to think of a women's fertile phase as lasting for about 9 or 10 days. This is very important info whether you are trying to prevent or plan for a pregnancy.
Dear's Advice: This is just a general overview, so if you're really interested in learning more about this, check out the amazing book, Taking Charge of Your Fertility.