ECM-mediated positional cues are able to induce pattern, but not new positional information, during axolotl limb regeneration.

The Mexican Axolotl is able to regenerate missing limb structures in any position along the limb axis throughout its life and serves as an excellent model to understand the basic mechanisms of endogenous regeneration. How the new pattern of the regenerating axolotl limb is established has not been completely resolved. An accumulating body of evidence indicates that pattern formation occurs in a hierarchical fashion, which consists of two different types of positional communications.

Infertility Centrality in the Woman's Identity and Goal Adjustment Predict Psychological Adjustment Among Women in Ongoing Fertility Treatments.

Purpose: Some of the women that go through repeated fertility treatments will not adjust well to the treatments and will experience increased distress. The present study examined how centrality of the fertility problem in the woman's identity and dispositional goal adjustment (disengagement and reengagement) are associated with the woman's psychological adjustment. These issues are examined in a context of a pro-natal society (Israel) where parenthood is a major life goal.