Changes in cervical neutrophil elastase levels during the menstrual cycle

Area of Science:

• Reproductive immunology
• Gynecological physiology

Background:

• Cervical mucus is crucial for reproductive processes and host defense.
• Neutrophil elastase (NE) is a key mediator of neutrophil activity.

Purpose of the Study:

• To investigate the changes in total neutrophil elastase (NE) levels within cervical mucus throughout the menstrual cycle.
• To understand the role of neutrophil activity in cervical mucus during different phases of the menstrual cycle.

Main Methods:

• Cervical mucus samples were collected from 31 healthy women with regular ovulatory cycles.
• Neutrophil elastase (NE) concentrations were measured during the follicular, ovulatory, and luteal phases.

Main Results:

• Mean cervical NE levels were 0.73 ± 0.57 μg/ml (follicular), 0.29 ± 0.33 μg/ml (ovulatory), and 1.32 ± 1.24 μg/ml (luteal).
• A statistically significant decrease in NE concentrations was observed during the ovulatory phase compared to the follicular and luteal phases.

Conclusions:

• Neutrophil activity in cervical mucus is notably reduced around the time of ovulation.
• The diminished NE levels and suppressed neutrophil activity during ovulation may create a more permissive environment for sperm migration.
• These findings offer insights into the dynamic immunological changes in the cervix that influence reproductive success.