What is the role of cervical mucus in female fertility?

• A. It stimulates ovulation
• B. It prevents sperm passage
• C. It allows sperm passage to the uterus
• D. It triggers menstrual shedding

Answer: (C)

Cervical mucus acts as a gatekeeper for fertility. Right around ovulation, estrogen makes cervical mucus plentiful, clear, thin, and very slippery. This changes the cervical canal into a sperm-friendly pathway, allowing sperm to swim through more easily and reach the uterus. The mucus also helps protect and nourish sperm and can create channels that guide them along the tract. Outside the fertile window, mucus becomes thick and hostile to sperm, helping to block passage. So, its role in fertility is to permit sperm passage to the uterus, facilitating fertilization. Stimulation of ovulation and triggering menstrual shedding are controlled by other hormonal processes, not by cervical mucus itself.