An estuary is a partly enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea.Estuaries form a transition zone between river environments and maritime environments.n estuary is a dynamic ecosystem with a connection with the open sea through which the sea water enters with the rhythm of the tides. The sea water entering the estuary is diluted by the fresh water flowing from rivers and streams.
Egg white cervical mucus (EWCM) is a type of cervical fluid that is produced right before ovulation. This mucus is called EWCM because it strongly resembles raw egg white in that it is clear or streaked and is very stretchy and can be watery.
The cervical mucus stages include: 1  Egg white cervical mucus: When the mucus is an egg white color and stretches an inch or two without breaking, this is the time when a woman is most fertile. 2  Watery cervical mucus: Watery discharge occurs before the egg-white color is seen and happens right before your most fertile time.