What is the period of prenatal?
What is the period of prenatal?
The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.
What are the characteristic of prenatal period?
The fetus is characterized by fused eyelids and distinct human somatic characteristics. The fetal period covers gestational weeks 11 to 26. During the fetal period, the total body weight (TBW) increases from approximately 5 to 500 g. Fetal period precedes embryonal period, during which a viable fetus is delivered.
What is prenatal development in your own words?
Prenatal development: The process of growth and development within the womb, in which a single-cell zygote (the cell formed by the combination of a sperm and an egg) becomes an embryo, a fetus, and then a baby. The first two weeks of development are concerned with simple cell multiplication.
What are the three stages in the prenatal period?
This union marks the beginning of the prenatal period, which in humans encompasses three distinct stages: (1) the pre-embryonic stage, the first two weeks of development, which is a period of cell division and initial differentiation (cell maturation), (2) the embryonic period, or period of organogenesis, which lasts …
What is germinal period?
The germinal period (about 14 days in length) lasts from conception to implantation of the zygote (fertilized egg) in the lining of the uterus.
What is the importance of prenatal period?
Pre-Pregnancy and prenatal care can help prevent complications and inform women about important steps they can take to protect their infant and ensure a healthy pregnancy. With regular prenatal care women can: Reduce the risk of pregnancy complications.
What are the hazards of prenatal development?
Prenatal risk factors include chronic maternal illness, certain maternal infections, toxin exposures and nutritional deficiencies. Risk factors in the perinatal period include pregnancy-related complications, prematurity and low birth weight, and infection exposure during pregnancy or at time of birth.
When did Britannica start writing about prenatal development?
She joined Britannica in 2006 and… See Article History. Alternative Title: antenatal development. Prenatal development, also called antenatal development, in humans, the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth (or parturition ). human fetus; prenatal development.
When does development begin in the prenatal period?
Prenatal Development. Development happens quickly during the prenatal period, which is the time between conception and birth. This period is generally divided into three stages: the germinal stage, the embryonic stage, and the fetal stage. Stage 1: The Germinal Stage.
What happens to the brain during the prenatal period?
Prenatal development is a time of remarkable change that helps set the stage for future psychological development. The brain develops over the course of the prenatal period, but it will continue to go through more changes during the early years of childhood. The process of prenatal development occurs in three main stages.
What are the activities of the prenatal period?
Prenatal Summary. These activities include hiccups, touching the face, breathing motions, urination, right- or left-handedness, thumb sucking, swallowing, yawning, jaw movement, reflexes, REM sleep, hearing, taste, sensation, and so on.