Pregnancy is an significant stage of a womanÂ’s life, and has the possible to effect the growing fetus and the mother. It has been recommended that pregnancy weight gain within the Institute of Medicine suggested ranges are associated with better pregnancy consequence than are weight gains outside these ranges. Maternal weight gain is depending on socio-economic status, biologic factors and cultural behaviors. Journal Article is sometimes called a Scientific Article, a Peer-Reviewed Article, or a Scholarly Research Article. Together, journal articles in a particular field are often referred to as The Literature. Journal articles are most often Primary Research Articles. However, they can also be Review Articles. These types of articles have different aims and requirements. Sometimes, an article describes a new tool or method. Because articles in scientific journals are specific, meticulously cited and peer-reviewed, journal databases are the best place to look for information on previous research on your species.