Changes in enzyme levels in human cervical mucus during the menstrual cycle

Area of Science:

• Biochemistry
• Gynecology
• Reproductive Biology

Background:

• Cervical mucus is a crucial secretion from the endocervical epithelium.
• Understanding its enzymatic composition is vital for reproductive health insights.
• The periovulatory period is a key phase in the menstrual cycle.

Purpose of the Study:

• To comparatively analyze the enzymatic profile of cervical mucus.
• To identify enzymes consistently present in cervical mucus.
• To investigate changes in enzymatic activity during the periovulatory phase and across different cycle lengths.

Main Methods:

• Comparative analysis of 30 enzymes in cervical mucus from 15 women.
• Focus on the periovulatory period (days 10-16 of the menstrual cycle).
• Enzyme activity comparison between cervical mucus and saliva in two women with varying cycle lengths (27-day and 20-day).
• Ovulation timing determined by hormone measurements (urine and blood), basal body temperature, and Billing's method.

Main Results:

• Nine distinct enzymes were consistently detected in cervical mucus.
• Significant changes in enzymatic activity were observed during the periovulatory period.
• A maximum enzymatic activity peak was identified for several enzymes during this fertile window.
• Enzymatic profiles differed between cervical mucus and saliva.

Conclusions:

• Cervical mucus exhibits a dynamic enzymatic profile that changes during the menstrual cycle.
• Several enzymes show peak activity around ovulation, suggesting a role in reproductive processes.
• Enzyme analysis in cervical mucus may offer insights into reproductive physiology and cycle variations.