two fetuses produced from separate eggs.
Twins which were developed from two separate eggs, released from the ovary and fertilized at the same time. They may or may not be of the same sex, differ physically and genetically and have separate placentas, and separate amnionic and chorionic membranes. They are sometimes called binovular twins, dissimilar twins, false twins, dizygotic twins or heterologous twins. Twins developed from the same egg, are knowns as monozygotic or identical twins.
result of the separate fertilization of two eggs released by the ovaries at the same time.
twins that develop from two different eggs fertilized by two different sperm; are not identical
Two fetuses develop from two separate, fertilized eggs; fraternal twins are not identical
Twins formed from two separate eggs that were fertilized at the same time. They may be the same or different genders and they have different genetic makeups. Also called dizygotic twins.
Twins that have developed from more than one fertilized egg; they are not genetically identical and each has its own placenta and amniotic sac.
Twins that have been produced by the simultaneous fertilization of two egg cells and who therefore share only on average 50 percent of their genes, just like other siblings; also called dizygotic twins.
nonidentical twins Two offspring of one pregnancy developing from two separate, fertilized eggs.
twins resulting from fertilization of separate eggs; genetically related as siblings.
Born at the same time but resulting from the fertilization of two different eggs, fraternal twins are no more genetically similar than siblings; identical twins result from the division of one fertilized egg and are genetically identical.
Results when two ova are produced and fertilised by two separate sperms. They may be quite dissimilar in genetic make-up and outward appearance. They may be the same or opposite sex.
Twins that arise from two different eggs that are (simultaneously) fertilized by different sperm cells. Their genetic similarity is no greater than that between ordinary siblings. See also identical twins.
Siblings who share the same womb at the same time but originate from two different eggs fertilized by two different sperm cells. Also called dizygotic twins.
Twins that originate from the fertilization of two separate ova (eggs). They are genetically different and may be the same or different sex.
Twins that develop from two fertilized eggs and develop in two placentas. Many times such twins do not resemble one another closely.
