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Twin

47:10

Do You Have An Unrelated Identical Twin? | Full Documentary | Finding The Most Identical Strangers

10:23

TWIN PROBLEMS - Merrell Twins

8:10

School Confuses Twins As Same Person

8:53

IGNORING MY TWIN BROTHER ON HIS BIRTHDAY FOR 24 HOURS!!

11:28

ABC ACRO GYMNASTICS CHALLENGE! | The Rybka Twins

Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic ("identical"), meaning that they develop from one zygote, which splits and forms two embryos, or dizygotic ("fraternal"), meaning that each twin develops from a separate egg and each egg is fertilized by its own sperm cell.
    • Facts 

    • Statistics 

    • Types and zygosity 

    • Dizygotic (fraternal) twins 

    • Monozygotic (identical) twins 

    • Mechanism 

    • Genetic and epigenetic similarity 

    • Polar body and semi-identical twins 

    • Degree of separation 

    • Demographics 

    • Ethnicity 

    • Predisposing factors 

    • Delivery interval 

    • Vanishing twins 

    • Conjoined twins 

    • Chimerism 

    • Partial molar twins 

    • Miscarried twin 

    • Low birth weight 

    • Stillbirths 

    • Heterotopic pregnancy 

    • Management of birth 

    • Human twin studies 

    • Bi-paternal twins 

    • Monozygotic twins of different sexes 

    • Semi-identical twins 

    • Language development 

    • Animals