Lehyla Calero has been with the Center since 2008 and manages many aspects of the Sibling Study. She is fully bilingual in Spanish and English and has developed extensive expertise in following a longitudinal birth cohort of mothers and newborns. This has included enrolling women during pregnancy, assisting in the collection of biologic samples from the mother and children, and conducting detailed interviews prenatally and postnatally. Her excellent interpersonal skills and ability to bond easily with study families have facilitated the excellent retention of families in the cohort. Ms. Calero has a Master’s Degree from the University Foundation of Popayan and New York University.