Often times, it is hard to a woman to clearly determine whether they are leaking amniotic fluid or not. During the last trimester, the baby can put a lot of pressure on the body and this can cause discharge from the cervix which is normal. Also, the baby places pressure on the bladder and thus can cause leaking urine.
For instance, if a scientific study is performed, the primary source is the initial report that is prepared by the scientist(s) who performed the research. Secondary Source: A secondary source is a document that is written about the primary source
Primary sources are written by the scientists that performed the experiment and are writing about it. They are normally found in peer-reviewed journals. Your example is of a primary source. Primary sources can cite other articles, but must be based on novel research. Secondary sources are commonly found in general magazines and newspapers in the science sections. They cite original research, and contribute nothing new or original to the report.