Pre-embryonic :begins with fertilization and encompasses the first 2 weeks thereafter. Cellular division and implantation occurs this stage of development.
Embryonic : this stage last from the end of the 2nd week after Fertilization until the end of the 8th Weeks is also the time when the women misses her first menstrual period.
Fetal: this stage is from the beginning of the 9th week after fertilization and continues until birth. At this time, the developing human is referred to as a fetus.
The three stages of prenatal development are the germinal stage, which lasts for about 2 weeks after conception; the embryonic stage, which lasts from about 2 weeks to 8 weeks after conception; and the fetal stage, which lasts from about 9 weeks after conception until birth. Each stage is characterized by different growth and development of the embryo or fetus.
There are "Three Major" stages in prenatal development it goes as follows:
The First Stage- The Germinal stage [Conception- 2 weeks]
This Stage only begins to occur after Conception, at this stage the sperm and egg have joined together and formed what many biologist call a Zygote, which is a fertilized egg. The Zygote then will travel from the Fallopian tubes which was the very site of it's origin and travel down to the mother's uterus. at this point it will begin to attach itself to the wall of the uterus and begin the processes of cellular division in which the number of cells begin to differentiate at an almost exponential rate. The cell's then begins to look like a ball of a 100 cells which is called the blastocyst. The Blastocyst is made up of three layers----- The Endoderm, The Mesoderm, and The Ectoderm. The Ectoderm becomes the skin , nail, hair, sensory organs and nervous system.
the Mesoderm becomes the muscle and bones, and the Endoderm becomes the respiratory and digestive system.
then from weeks [3-8] the Second stage develops and it is called the Embryonic Stage. at this stage all the major organs begin to develop. There is more to this stage but since your just asking for the stages, the details are not vital.
Lastly it's the fetal stage [9 --birth] the previous body developments just begin to develop more rapidly, the formation of the neural tube occurs, which will become the brain and spinal cord, heart beat grows stronger and the babies weight increases.
Those are all the stages.
E.B. SS520
germinal (sperm and egg meet), embryo (dna begings to form parts), fetal (cells mature) germinal (sperm and egg meet), embryo (dna begings to form parts), fetal (cells mature)
Have a look on classweb.gmu.edu/awinsler/ordp/prenatal.html-
Embryonic stage,where the spam meets the egg and the foetus is formed.
Prenatal development occurs in three main stages: the germinal stage (first two weeks after conception), the embryonic stage (weeks 3-8), and the fetal stage (weeks 9-birth). During these stages, the fertilized egg undergoes cell division, differentiation, and organ formation, leading to the development of a fetus.
Prenatal development begins at the moment of conception when a sperm fertilizes an egg to form a zygote. This zygote then undergoes rapid cell division and differentiation, eventually developing into a fetus.
Agents that have a negative effect on prenatal development are called teratogens. These can include drugs, alcohol, certain medications, infections, and environmental pollutants that can interfere with the normal development of the fetus.
The prenatal stages refer to the developmental stages before birth. They include the germinal stage (conception to 2 weeks), the embryonic stage (2-8 weeks), and the fetal stage (8 weeks to birth). These stages are critical for the growth and formation of all major organs and systems in the developing fetus.
Factors that can affect prenatal development include the mother's health, nutrition, exposure to harmful substances (such as drugs and alcohol), genetics, and stress levels. Additionally, environmental factors like pollution and infections can also impact the development of the fetus.
No. The embryo and the fetus are two separate stages in a baby's prenatal development.
1. xygote 2. gamete 3. embryo 4. fetus (also spelled foetus, fœtus, faetus or fætus) 5. infant...
There are typically 8 stages of human development according to psychologist Erik Erikson, spanning from infancy to old age.
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distinguish between prenatal & postnatal
I believe the four stages of development are (1) egg, (2) larvae, (3) pupa, and (4) adult.
During prenatal development, a particular organ or body part is most vulnerable to exposure to teratogens during its:
1. Prenatal 2. Child 3. Adolescence/Puberty 4. Adult 5. Death
Prenatal vitamins is what i recomend .
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Prenatal development begins at the moment of conception when a sperm fertilizes an egg to form a zygote. This zygote then undergoes rapid cell division and differentiation, eventually developing into a fetus.
First Stage: The first two weeks after conception are known as the Germinal stage. Second Stage: The next six weeks of development are known as the Embryonic stage. Third Stage: The remainder of prenatal development is known as the Fetal stage.