मौखिक गर्भनिरोधक गोलियां मुख्य रूप से किस तंत्र द्वारा जन्म नियंत्रण में मदद करती हैं?

Which mechanical barrier method is commonly used in family planning to prevent pregnancy by physically blocking sperm entry?

A 32-year-old multiparous woman (P3L3) visits a health center on day 5 of her menstrual cycle requesting permanent contraception. She has no associated medical illnesses. What is the most appropriate action according to medical guidelines?