Primitive streak and Sacrococcygeal teratoma

Primitive streak The primitive streak is a structure that forms in the blastocyst during the third week of development. It forms on the caudal end of the embryonic disc. The primitive streak determines the site of gastrulation and initiates the gastrulation. Gastrulation is the process in which three germ layers ectoderm, endoderm, and mesoderm are …

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fertilization its stages, results and capacitation

Fertilization Fertilization is the process of union of male and female gametes that occur in the ampulla of the fallopian tube. The result of fertilization is the production of a unicellular embryo called a zygote. After the formation of the zygote, the prenatal development starts. Scientists discovered the dynamics of human fertilization for the first …

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