How to have twins
The idea of having twins tends to polarise people. Some couples say they’d love the chance to parent two babies and others react in an entirely different way. If you are a twin or have twin siblings then your concept of the reality is likely to be very different to someone who’s never had anything to do with more than one baby at a time.
Are twins common?
Many reproductive experts believe that as humans we probably have more twin pregnancies than any of us are aware of. Technological advances have found that it is reasonably common for there to be more than one embryo conceived and implanted, but of these, only one is viable and survives.
How do twins happen?
If you are keen to increase your chances of conceiving two babies then it’s important to understand how twins are made.
There are two types of twins; identical and non-identical. Identical or monozygotic twins are formed when one egg is fertilized by one sperm which then divides into two separate embryos. Each shares exactly the same genetic components and identical genetic structures. Identical twins also share a placenta.
Non-identical or dizygotic twins form from two separate eggs being fertilised by two separate sperm. These twins are their own unique little individuals and share no more genetic composition than siblings with the same parents. Each baby in a non-identical twin pair will have its own placenta.
Another name for non-identical twins is fraternal; the other name for identical twins is non-fraternal.