Twins are two offspring produced by the same pregnancy. Twins can be either dizygotic(fraternal twins) or monozygotic twins. Both monozygotic and dizygotic twins are known to have an increased risk of structural defects compared to the singletons. Structural defects in monozygotic twins however, are three times more frequent than among dizygotic twins and approximately 2-3 times more frequent than in single-tones.
Dizygotic twins are the result of two different ova fertilized by two different sperm.Their genetic contribution is different since it comes from two different ova and two different sperm.Dizygotic twining is a common occurrence in animals.
All most of all dizygotic twins have two placentas, two chorions and two amnions, i.e., be diamniotic and di - chorionic. However, these two may fuse and look like one. The highest twining rate is seen in the black populations(Africans) and lowest in Asian populations. But dizygotic twining rate is closely related with maternal age, parity , height , weight and also on gonadotrophin levels.
These are also called as identical twins and are the result of fertilization of one ovum with one sperm. The single fertilized ovum then divides into two embryos, both embryos are thought to have same genetic contribution.In very rare cases, identical twins can be different sexes. These twins begin as identical male twins.
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It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
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Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
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