The cervical mucus method

The cervical mucus method is based on a mucus change that occurs during the menstrual cycle. The hormones that control menstrual cycle phases also act on the glands of the cervix that produce mucus secretions. The mucus secreted by the cervix collects in the cervix and vagina. It changes in quality and quantity just before and during ovulation. The cervical mucus method is also known as the ovulation method or the Billings method.

The Mucus Pattern

The cycle begins with menstruation. During vaginal bleeding, the flow disguises the mucus signs. The menstrual period is usually followed by a few days when no mucus is present - these are 'dry days'. As an egg starts to ripen, mucus increases in the vagina and appears at the vaginal opening. It is generally yellow or white, and it is cloudy and sticky. The greatest amount of cervical mucus usually occurs immediately before ovulation during the 'wet days'. The mucus takes on a clear and slippery quality that resembles raw egg whites. When the mucus can be stretched between the fingers, it is called spinnbarkeit (German for stretchable). This is the peak period of fertility. About four days after the wet days begin, mucus may abruptly become cloudy and sticky, reduce sharply in volume, and a few dry days may return before your period starts.