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.
Other names for progestin-only oral contraceptives are minipills and progestin-only pills (POPs). Progestins can prevent fertilization by preventing a woman's egg from fully developing. Also, progestins cause changes at the opening of the uterus, such as thickening of the cervical mucus.ther names for progestin-only oral contraceptives are minipills and progestin-only pills (POPs). Progestins can prevent fertilization by preventing a woman's egg from fully developing. Also, progestins cause changes at the opening of the uterus, such as thickening of the cervical mucus.