The sodium-potassium ratio of cervical mucus. A preliminary report.
D001683:Biological Clocks; D002582:Cervix Mucus / Q000378:metabolism*; D005260:Female; D006801:Humans; D008598:Menstruation; D010783:Photometry; D011188:Potassium / Q000378:metabolism*; D012964:Sodium / Q000378:metabolism*
D012964:Sodium; D011188:Potassium