Canine herpesvirus is an infectious disease that is a common cause of death in puppies less than three weeks old. Pseudorabies is an infectious disease that primarily affects swine, but can also cause a fatal disease in dogs with signs similar to rabies.
Progestin-only birth control pills, sometimes called âmini-pills,â have several effects in the body that help prevent pregnancy: 1  The mucus in the cervix thickens, making it difficult for sperm to enter the uterus and fertilize an egg. 2  They stop ovulation, but they do not do so consistently.
How do POPs work? There are many ways in which progestin-only pills work: they thicken cervical mucus; decrease ovulation (the release of an egg) or fertilization; and change the lining of the fallopian tubes and uterus. To be most effective, these pills must be taken every day at the same time.