The correct answer here would be a university study. While the other
mediums might have data that means well and is actually intended to help
people lose weight, it's doubtful that this could be defined as
authoritative. A university study, however, is likely to contain data
obtained through scientific methods.
Answer: Progesterone
Explanation: By stopping ovulation , that is, the release of the egg from the ovaries, pregnancy is prevented.
This is because there won't be any egg available for the sperm to fertilise.
It should be noted that this process mimics the body's natural response to pregnancy.
