Zygote is defined as a new and single cell formed at conception from the union of a sperm and an ovum (egg cell); a fertilized egg. Likewise, Zygote is the first phase of fetal development, when a single cell is formed from two (2) gametes.

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Conception at psychology-glossary.com■■■■■■■■
Conception refers to the process when a sperm and egg unite, resulting in an embryo or fetus . - -- . . . Read More
Fertilization at psychology-glossary.com■■■■■■■
Fertilization is defined as the union of two (2) gametes, which occurs when a haploid sperm and a haploid . . . Read More
In vitro fertilization at psychology-glossary.com■■■■■
In vitro fertilization refers to the fertilization of an ovum in a laboratory dish. In vitro fertilization . . . Read More
Ovum at psychology-glossary.com■■■■■
Ovum is an egg; the female germ cell; - - In psychology, "ovum" typically refers to the female gamete . . . Read More
Period of the zygote at psychology-glossary.com■■■■
Period of the zygote refers to the first phase of prenatal development that lasts from conception until . . . Read More
Dizygotic at psychology-glossary.com■■■■
Dizygotic that which pertains to or derived from two (2) separate zygotes; - - In psychology, dizygotic . . . Read More
Gamete at psychology-glossary.com■■■■
Gamete refers to a male or female reproductive cell - the spermatozoon or ovum; a mature germ cell involved . . . Read More
Blastocyst at psychology-glossary.com■■■
Blastocyst refers to the hollow ball of embryonic cells that enters the uterus from the Fallopian tube . . . Read More
Germ disc at psychology-glossary.com■■■
Germ disc is defined as small cluster of cells near the center of the zygote that will eventually develop . . . Read More
Embryo at psychology-glossary.com■■■
Embryo refers to the developing organism from the 2nd to the 8th week of gestation ; a name given to . . . Read More