The term period is used to define a space in time during which a series of events or phenomena occurs. Usually these happen continuously and consistently, they have a beginning and an end. In the same way, this term will be understood as a phase, a stage, a transition and a cycle. It is characterized by being repetitive, that is, its movement can be appreciated more than once in time. In addition to this, the word and its concept can be applied in different areas and fields of knowledge.

In this sense, the word period is used in the evolutionary area to refer to the processes that an organism goes through for its development . They are transitory stages in which the period of birth or creation, of adaptation or maturation is observed. Of course, these are presented and vary depending on the case. Moreover, the term also is used to name menstruation of women, a cyclical process is repeated each month. This focuses on the preparation of the uterus and the female body for the fertilization of the ovum and conception of a baby.

For its part, in history, those transitions through which man has passed from his appearance on Earth to the present are called a period. They are determined, named and identified according to the events or events that have occurred. In this way, the area of ​​history is divided to facilitate the human mind, understanding and understanding of evolution. Not only from the biological point of view, it includes culture, customs and ways of life, as well as technological advances.

The period according to the area

• Periods in history: In history, a period is called the division or fragmentation that is made of historical facts and events. These are recorded and reflected chronologically, in addition, it is presented in eon, era, period , epoch and age. This action or practice is known as periodization. For example, in the case of the Stone Age, it is divided into the Paleolithic, Mesolithic and Neolithic periods.
• Science Periods: In this case, the word science period encompasses medicine, biology, and physiology. It is used in this area to refer to the processes and cycles that occur in various organisms. Regardless of their origin or form, systems are characterized by having specific periods in their development. For example, it can be an incubation or gestation period to start the life of a bacterium , a plant, animal or a human.
• Period in physics: In physics, the time and duration it takes for a body or object to get from one point to another is named as a period. Specifically, it is called the period of oscillation as the time it takes for a wave to traverse or travel from a starting point to the end point. This concept or idea is used in both physics and mathematics.
• Periods in geology: In this science, periods are understood as a group of phenomena or conditions that occur and affect the Earth. These can be manifested in the environment and in biological factors during a specific time. It refers to the population of living beings that inhabit the planet, the way in which they modify and evolve in the environment. Such is the case of the Jurassic, Triassic and Cretaceous periods.
• Female Period: This is the name given to the cycle that occurs in a woman’s uterus during her preparation for conception. It bears the name of menstruation or period to be repeated periodically, that is, during a specific moment in time. It appears and begins its cycle with the first day of menstruation, when the fertilization of the ovum does not occur. In this way, approximately 28 days later, the preparation process begins again, the cycle is repeated.

Examples of periods

• Conception or incubation.
• Orbital period.
• Of adaptation.
• Of maturation.
• Archaic Period.
• The Classic period.
• Menstrual period.
• Developmental.