Gary Ginsberg, Ph.D, Faculty, Yale School of Medicine and University of Connecticut School of Public Health, explains how breathing difficulties or other health issues that are worse at home, work or school can affect your health.

After years of trying to get pregnant, doctors told Kelsi Pierce it would be near impossible for her to conceive a child. However, Kelsi got the surprise of her life when her mom volunteered to be her surrogate — and she found out she, too, was pregnant!