• Categories

  • Most Popular Questions

  • Recently Viewed Questions

  • Recent Answers

    How To Make a Digita… on What does a frequency of 100 H…
    Daigrepont on Can an earthquake cause air tu…
    Benedict on How did God come into exi…
    joshua on How does the human body g…
    Ian on How did God come into exi…
  • Recent Questions

  • Blog Stats

    • 2,227,985 hits
  • Visitors since 11-3-08

    counter create hit
  • Terms and Conditions

  • Warning

    We are doing maintenance on this site, so some posts may disappear for a short time. Sorry. Normal service will soon be resumed...
  • Pages

  • March 2008
    M T W T F S S
    « Feb   Apr »
  • Archives

  • Meta

  • Advertisements

How are twins formed?

How are twins formed?
Liam Mcherson from Stockton on Tees (Aged 5-14)


2 Responses

  1. How twins are formed depends on the type of twins, identical or non-identical.

    Identical twins are formed when one egg gets fertilised and then starts dividing. When the bundle of cells is still very small it splits into two and both carry on dividing. This means there are two bundles of cells that are exactly the same and these will grow to be a pair of identical twins.

    Non-identical twins are formed when two different eggs get fertilised. Each egg is different so two non identical twins are formed

  2. There are two main ways that twins happen.

    The most common is “Dizygotic twins” where the mum has released two eggs at the same time and both fertilise and implant in the womb.

    Monozygotic (identical) twins occur when one fertilised egg divides into two separate embryos very soon after fertilisation.

    The number of twins in the UK has increased over the last few years as many fertility treatments such as IVF involve putting two embryos back into the womb – giving a higher chance of dizygotic twins!

    For more information see:

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

%d bloggers like this: