This article examines current research pertaining to the relationship between a mother and her children, and how this relationship may affect sibling interactions. Issues such as temperament, gender, and the age gap between children are also explored to ascertain their impact on the sibling relationship.

The displacement of the first-born child and the ensuing sense of loss and anger he may experience as a result of this is explored. The mother's second pregnancy is also discussed in regard to the impact of unresolved issues relating to her own sibling relations. The mother's interactions with each child, her role as a model for identification, and marital relations are discussed in light of their impact on sibling relations.

The evolution of a positive attachment between siblings is explored. Rivalrous behavior between siblings is also discussed, particularly in association to the mother's treatment of her own children and the manner in which the mother deals with her own aggression.