Why does the function of the hormone oxytocin in the progression of labor during childbirth illustrate a positive feedback mechanism? because an increase in oxytocin level decreases the contractions because an increase in oxytocin level increases the contractions because an increase in oxytocin level has no effect on the contractions nextreset

Because an increase in oxytocin level increases the contractions 

Oxytocin can be defined as a hormone that usually acts on organs of the body which includes the uterus and breast. They can also act as a chemical messenger in the brain by controlling some important aspect of reproductive system such as lactation and childbirth. However, the positive feedback mechanism of oxytocin is that an increase in release of oxytocin will stimulate more contractions.

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.