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.
As ovulation approaches, rising levels of oestrogen increase the amount of cervical mucus you produce, making it thinner and stretchier. Just before ovulation it will change from white or creamy coloured to become thin, watery and transparent. Frankly, it looks like egg white.