It is certain that mafia refers to secretive groups which cause organized crimes in over the world. Their names in many cases are known by the name of the continent they originated in and the majority of members will likely be of the nationality. Their activities are invariably illegal like drugs, firearm trafficking, etc. Here is the set of the biggest and quite a few dangerous mafia groups in the world. When a woman is pregnant, high amounts of this female hormone are designed by the placenta, beginning throughout the end of her first trimester of being pregnant on and on on until she gives birth to a baby. A pregnant woman's progesterone levels are approximately much higher than it is in the woman who is not pregnant.