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
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
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
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 (DZ) twins at psychology-glossary.com■■■■
Dizygotic (DZ) twins refers to Fraternal twins , who develop from two (2) separate eggs/zygotes fertilized . . . Read More
MZ twins at psychology-glossary.com■■■■
MZ twins also known as Monozygotic twins are identical twins , who develop from a single fertilized egg . . . Read More
Dizygotic (Fraternal) twins at psychology-glossary.com■■■■
Dizygotic (Fraternal) twins is defined as twins that result when a mother releases two (2) ova at roughly . . . Read More
Zygote Intra-Fallopian Tube Transfer (ZIFT) at psychology-glossary.com■■■■
Zygote Intra-Fallopian Tube Transfer (ZIFT) refers too a reproductive technique in which the sperm and . . . 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