Microbiology: A Systems Approach 4th Edition by Marjorie Kelly Cowan

Exercise 12

Critical thinking is the ability to reason and solve problems using facts and concepts. These questions can be approached from a number of angles and, in most cases, they do not have a single correct answer.
Because the acidic vaginal pH is maintained in part by normal biota during reproductive years to prevent microbial infection, describe how sperm are capable of gaining entrance into the uterus on their way to fertilizing an ovum.