https://wikimd.org/index.php?action=history&feed=atom&title=Prenatal_developmentPrenatal development - Revision history2026-05-12T00:56:40ZRevision history for this page on the wikiMediaWiki 1.44.2https://wikimd.org/index.php?title=Prenatal_development&diff=5640854&oldid=prevPrab: CSV import2024-04-21T13:53:35Z<p>CSV import</p>
<p><b>New page</b></p><div>[[Image:Prenatal_development_table.svg|Prenatal development table|thumb]] [[Image:Sperm-egg.jpg|Sperm-egg|thumb|left]] [[File:HumanEmbryogenesis.svg|HumanEmbryogenesis|thumb|left]] '''Prenatal development''' refers to the process of [[growth]] and [[development]] within the [[womb]] from [[conception]] to [[birth]]. It is a complex process that marks the formation and maturation of a [[fetus]] or embryo. Prenatal development is typically divided into three distinct stages: the [[germinal stage]], the [[embryonic stage]], and the [[fetal stage]].<br />
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== Germinal Stage ==<br />
The germinal stage begins at conception when the [[sperm]] fertilizes the [[egg]] to form a [[zygote]]. This period covers the first two weeks of development, during which the zygote undergoes rapid [[cell division]] and moves towards the uterus to implant itself in the uterine wall. The formation of the [[placenta]] also begins during this stage, which will play a crucial role in nourishing the embryo throughout its development.<br />
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== Embryonic Stage ==<br />
The embryonic stage spans from the end of the germinal stage to the end of the eighth week of pregnancy. During this stage, the basic forms of all major body systems develop, including the [[heart]], [[brain]], and [[spinal cord]]. This period is critical for the structural development of the embryo, and it is during this time that the embryo is most susceptible to damage from environmental factors, known as [[teratogens]], which can cause [[birth defects]]. The process of organogenesis, where organs begin to form, takes place during this stage.<br />
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== Fetal Stage ==<br />
The fetal stage begins at the ninth week of pregnancy and continues until [[birth]]. This stage is characterized by the rapid growth of the body and the maturation of the systems established during the embryonic stage. The fetus becomes more active, and its movements can often be felt by the mother. The final development of the organs occurs during this stage, and the fetus gains the ability to survive outside the womb with the development of the [[lungs]].<br />
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== Factors Affecting Prenatal Development ==<br />
Several factors can influence prenatal development, including the mother's health, behavior, and environment. Nutritional deficiencies, exposure to toxins, and infectious diseases can adversely affect the development of the fetus. Additionally, the mother's emotional state and stress levels can also have an impact on fetal development.<br />
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== Conclusion ==<br />
Prenatal development is a critical period that lays the foundation for a person's physical and mental health. Understanding the stages of development and the factors that can influence them is important for ensuring the health and well-being of both the mother and the fetus.<br />
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[[Category:Developmental biology]]<br />
[[Category:Obstetrics]]<br />
[[Category:Human pregnancy]]<br />
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