Ice breakers can be used to create familiarity within the group and ease everyone into the group process. The desired end result is a more open discussion forum and pleasing environment within the group in which the group process can continue.
1 To form identical or monozygotic twins, one fertilised egg (ovum) splits and develops into two babies with exactly the same genetic information.  To form fraternal or dizygotic twins, two eggs (ova) are fertilised by two sperm and produce two genetically unique children.
Fraternal twins develop when two eggs are fertilized. So if older women are more likely to produce two eggs per cycle, they're also more likely to have fraternal twins, the researchers argue. The study doesn't cover identical twins, which are much rarer and develop from one fertilized egg.