Progesterone hormone causes mucus secreted by the cervix to be thicker.
Progesterone hormone is released by the ovaries. Changing progesterone levels donate to irregular menstrual periods and menopausal symptoms. Progesterone is essential for the implantation of the fertilized egg in the uterus and for maintaining pregnancy.
Many hormonal contraceptives such as the combined oral contraceptive pill contain progesterone which inhibits follicular development, prevents ovulation, and thickens the cervical fluid, thick cervical fluid prevents pregnancy by stopping the sperm from reaching an egg.
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