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Early Stages. The germinal stage of pregnancy starts at the time of conception, when the sperm and the egg combine to form a zygote. During the germinal stage, the zygote begins to divide in order to implant into the uterine wall. Once implantation is complete, the embryonic stage begins.
Jun 14, 2021 · Here's a look at what's going on behind the scenes during the first two weeks of pregnancy—the germinal stage. A New Life's First Journey. When an egg is fertilized, the result is a single-celled organism called a zygote, which then develops into a multicellular structure called an embryo.
Aug 10, 2018 · The germinal stage involves several different processes that change an egg and sperm first into a zygote, and then into an embryo. The processes include fertilization, cleavage, blastulation, and implantation. Fertilization takes place when a haploid sperm successfully enters a haploid egg and triggers the egg to complete meiosis II.
prenatal development, in humans, the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth (or parturition ). Track the development of a human being from embryo to fetus to newborn. Learn about human embryonic and fetal development from fertilization to birth. See all videos for this article.
The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus. The germinal stage takes around 10 days. [1] During this stage, the zygote begins to divide, in a process called cleavage .
Apr 17, 2023 · Week 1 is a major part of the germinal stage of development, a period of time that continues from fertilization through uterine implantation. Important events that occur during the first week of human embryonic development include gamete approximation, contact and fusion of gametes, fertilization, mitotic cleavage of the blastomere, morula ...
Reviewed/Revised May 2021 | Modified Sep 2022. VIEW PROFESSIONAL VERSION. GET THE QUICK FACTS. Fertilization |. Development of the Blastocyst |. Development of the Embryo |. Development of the Fetus and Placenta. A baby goes through several stages of development, beginning as a fertilized egg.
