Osmosis is the result of diffusion across a semipermeable membrane. If two solutions of different concentration are separated by a semipermeable membrane, then the solvent will tend to diffuse across the membrane from the less concentrated to the more concentrated solution.
Signs and symptoms of more-advanced cervical cancer include: 1  Vaginal bleeding after intercourse, between periods or after menopause. 2  Watery, bloody vaginal discharge that may be heavy and have a foul odor.  Pelvic pain or pain during intercourse.
STIs such as chlamydia and gonorrhea are caused by bacteria passed between partners during sexual contact. In women, these common STIs attack cervical cells and can cause not only bleeding but a variety of other symptoms, such as vaginal discharge, pelvic pain, itching, and burning.