Quick Answer. In some rare cases, excessive stress causes bleeding between periods. It is more common that another condition is responsible, such as pregnancy, polycystic ovary syndrome, infection, pelvic inflammatory disease or side effects of medication, according to WebMD.
Characteristics of Scientific Research. When researches progress to a certain degree, turning over to think about them in time will contribute to advance their process and make them develop healthily in correct direction. Therefore, let's have a look into the characteristics of our work macroscopically and generally.
Explain that scientific knowledge is both durable and robust and open to change. Scientific knowledge can change because it is often examined and re-examined by new investigations and scientific argumentation. Because of these frequent examinations, scientific knowledge becomes stronger, leading to its durability.