What is the reason for increased and viscous leukorrhea during the mid-cycle of menstruation?

Patient's question:

I had my period on November 21st and it wasn't clean until the 27th. From December 1st to 5th, my underwear was always wet, and I felt like I had a lot of leukorrhea, which was a bit thick. Is this the ovulation period? Please let me know.

Doctor's answer:

Is the leukorrhea normal? It needs to be observed from several aspects, including quantity, color, texture, and odor. Normal leukorrhea should be milky white or colorless and transparent, with a slightly fishy smell or no smell at all. Its secretion volume and texture are influenced by the levels of estrogen and progesterone in the body, exhibiting cyclical changes in quantity (more or less) and texture (thinner or thicker) throughout the menstrual cycle. Generally, leukorrhea decreases after the menstrual period. As the estrogen level rises before ovulation, it promotes the proliferation of epithelial cells in the cervical glands, increasing the secretion of cervical mucus. The sodium chloride content in the mucus also increases, allowing it to absorb more moisture. This results in increased leukorrhea during ovulation, with a thinner texture, clear color, and an appearance similar to egg white, which can be stretched into long strands. After ovulation, the estrogen level gradually decreases while the progesterone level rises, inhibiting the secretion of cervical mucus and reducing its sodium chloride content. This makes the leukorrhea at this time thicker, milky white, and less extensible, with easily broken strands. If leukorrhea increases without any reason or is accompanied by changes in color, texture, or odor, it is important to be vigilant.

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