Watery cervical mucus.

http://www.babycenter.com/101_what-cervical-mucus-looks-like-through-your-cycle_10351429.bc

Watery CM is second best for conception, after egg white CM. It allows sperm to move unhindered into the cervix, but doesn't make the sperm's job quite as easy. When you have watery CM, you may feel as though you've leaked urine in your underwear. Watery CM is clear in color and drips or runs off your fingers.