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NEET UG 2026 » NEET UG Study Material » Biology » Embryogeny
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Embryogeny

Embryogenesis/ Embryogeny is the term used to describe the process through which an embryo is produced and grows into a foetus.

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An embryologist is someone who specializes in the principles of embryos, starting with their conception and progressing through their growth to maturity. It is the process through which a single cell, an embryo, develops into a fully formed kid in an average of 266 days, or nine months. It is, on the other hand, the development of an embryo and a foetus by its parents. In the field of embryology, Karl Ernst Von Baer is renowned as the “Father of Embryology.” He was an Estonian professor who specialised in the research of embryos and development. while making the discovery that is credited with laying the groundwork for current comparative embryology To comprehend the relationship between organ systems, such as the nervous system and muscle, it is necessary to study embryology.

Human Growth and Development

In the course of a long and complicated process, a single cell develops into a highly developed multicellular human person. Embryonic development begins with the fertilisation of an egg by a sperm, which develops into an organ system and then into early transformations with the assistance of a variety of different processes such as cell migration, proliferation, cell differentiation, apoptosis, and cell rearrangement.

Healthcare-related measures that are necessary

  • Prenatal diagnostics as well as surgical intervention.
  • Infertility treatments are available through a variety of means.
  • Mechanisms for preventing birth abnormalities are being researched.

Pregnancy Duration and Stages of Development

When it comes to humans, gestation lasts an average of 266 days (38 weeks, 9 months). Trimesters are three-month intervals that are used to divide the year.

First Trimester (First Three Months, Weeks 1 to 12 Weeks)  

During the first trimester of pregnancy (First Three Months, Weeks 1 to 12 Weeks)

Embryonic development stress and dietary shortages are the most life-threatening symptoms to experience during this time. Pregnancy-related morning sickness is also associated with this vital phase, and it has the added benefit of making mom less inclined to consume potentially harmful foods such as cabbage, Brussel sprouts, potatoes, overcooked meats, and so on. All of these contain chemicals that are potentially damaging to the developing embryo. Coffee, for example, contains approximately 1000 distinct types of poisons.

Second Trimester (Second Three Months, Week 13 to 24)

This is the second trimester of pregnancy (Second Three Months, weeks 13 to 24)

Foetal development begins during this period, and organs finish the majority of their development during this time.

Third Trimester ( Third Three Months, Week 25-Birth)

During the third trimester of pregnancy ( Third Three Months, Week 25-Birth)

Babies’ development and maturation continue throughout this stage. At this point, the baby can extend itself and kick, which will be followed by further motions. During the first thirty weeks of pregnancy, there is significant growth in the baby’s sense organs, with the appearance of fingers and nails, the hardening of bones, and the creation of red blood cells (RBCs) in the bone marrow.

Embryology Is Divided Into Several Types

Embryology in a Descriptive Manner

It is possible to describe Descriptive Embryology as the branch of research that is concerned with the direct observation and description of embryological development.

Comparative Embryology

Comparative Embryology is a branch of biology that studies the development of embryos in comparison to other organisms.

Comparative embryology can be described as the study of the embryological development of distinct species in comparison to one another. This sets the path for a far more meaningful understanding of evolution and phylogenetic importance to be gained in the future.

Embryology in the Laboratory

This branch of embryology is sometimes known as Casual Embryology or Analytical Embryology, depending on who is talking about it.

Experimental Embryology is the study of embryonic development through the use of embryos that have undergone various stages of experimentation. The study of organisms’ underlying systems also aids in understanding the creatures’ behaviour. In this procedure, the embryos are dissected and various components of the embryo are removed, transplanted, and even the environmental conditions are changed.

Chemical Embryology

Chemical Embryology is a type of embryology in which chemicals are used to create embryos.

Chemical Embryology can be defined as Embryology that makes use of biophysical, biochemical, and biological approaches in the process of development. Physiological or biochemical Embryology are other names for this field of study.

Tetralogy

It is a branch of Embryology that is concerned with the malfunctioning of embryonic development.

Conclusion

It is the process through which a multicellular embryo develops from a unicellular zygote that is known as embryogenesis. It all starts with the union of the male and female gametes, which results in the formation of the zygote, which is a diploid cell. During the human pregnancy, the embryonic phase lasts up to 11 weeks, after which the foetal development begins. Organogenesis occurs at the fourth stage of embryogenesis (cleavage), which precedes gastrulation, neurulation, and organogenesis.

Plant embryogenesis is divided into the following stages: the production of the zygote, the formation of a globular embryo, the construction of a heart-shaped embryo, and lastly the formation of a mature embryo.

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Frequently asked questions

Get answers to the most common queries related to the NEET UG Examination Preparation.

Explain the distinction between spermatogenesis and oogenesis.

Ans : Oogenesis is the process of egg cells being formed ins...Read full

What is the process of gastrulation and how does it work?

Ans : It is the process of arranging the embryo from a single...Read full

What is the most significant distinction between zygotic and non-zygotic seeds, and how do they differ?

Ans : In contrast to zygotic seeds, which are created by the ...Read full

What is non-zygotic embryogenesis, and how does it work?

Ans : Non-zygotic embryogenesis refers to the production of zygotes from cells other than g...Read full

Ans : Oogenesis is the process of egg cells being formed inside the ovary while spermatogenesis is the process by which sperm cells are formed inside the testicles.

Ans : It is the process of arranging the embryo from a single layer of epithelial cells into a multilayered structure known as the gastrula which is called Gastrulation.

Ans : In contrast to zygotic seeds, which are created by the union of two gametes, non-zygotic seeds are formed by the fusion of cells other than gametic cells.

 

Ans : Non-zygotic embryogenesis refers to the production of zygotes from cells other than gametic cells, such as sporophytic cells, unfertilized eggs, or male gametophytic cells, rather than from gametic cells themselves.

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