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Prenatal development (from Latin natalis 'relating to birth') involves the development of the embryo and of the fetus during a viviparous animal's gestation.Prenatal development starts with fertilization, in the germinal stage of embryonic development, and continues in fetal development until birth.
Prof. Charles Adriaan van Ophuijsen [nl; id], who devised the orthography, was a Dutch linguist.He was a former inspector in a school at Bukittinggi, West Sumatra in the 1890s, before he became a professor of the Malay language at Leiden University in the Netherlands.
A blastocele is a small cavity on the center of the embryo, and the developing embryonary cells will grow around it. Then, a flat layer cell forms on the exterior of this cavity, and the zona pellucida, the blastocyst's barrier, remains the same size as before.