No the egg white cervical mucous (literally like raw egg white - transparent, very stretchy) is the most fertile. The watery stuff is very fertile too, it usually comes just before, sometimes in between, the ewcm. Some women don't get the ewcm but it is the liquid gold of CM as it allows sperm to survive longer, swim further etc. Usually you ovulate on the last day of your most fertile CM, though some women will get a spot of residual watery or ewcm a few days after ovulation.