"The formal story began in 1866 when a physician named John Langdon Down published an essay in England in which he described a set of children with common features who were distinct from other children with mental retardation." Down was superintendent of an asylum for children with mental retardat...

"The formal story began in 1866, when a physician named John Langdon Down published an essay in England in which he described a set of children with common features who were distinct from other children with mental retardation." Down was superintendent of an asylum for children with menta...

Prenatal development is the period in development from conception to the onset of labor. Perinatal period is the period beginning about the seventh month of pregnancy and continuing until about four weeks after birth. Postnatal development is the period in development the follows dir...

Does everyone have the right to be a parent? In biology a parent is usually the individuals which have a diploid cell that undergoes several mitotic divisions and finally about 3 meiotic division giving rise to either a male or female gamete. When the female haploid and male haploid fuse to...