-
Now Playing: DHA May Have No Real Benefits for Expecting Moms
-
Now Playing: Does Depression Increase Surgery Death Risk?
-
Now Playing: Talk to Your Parents About Depression
-
Now Playing: Managing Your Child's Allergies While They're Away
-
Now Playing: The Cuddle Hormone
-
Now Playing: Examining Lung Cancer Without Surgery
-
Now Playing: Antiretroviral Drugs May Prevent HIV Infection
-
Now Playing: How To Treat a Child's Ear Infection
-
Now Playing: Best Way to Screen for Breast Cancer?
-
Now Playing: Chronic Pot Users at Higher Risk for Brain Issues
-
Now Playing: Detecting Heart Failure
-
Now Playing: Exercise May Be a Deterrent for Uterine Cancer
-
Now Playing: Are Parents Falling Short on Teens' Health?
-
Now Playing: Reconstructive Breast Implants: Silicone or Saline
-
Now Playing: Hyper-Texting Teens Linked to Risky Behavior
-
Now Playing: Is Genomic Cancer Screening Reliable?
-
Now Playing: Alleviating Flu Symptoms: What Works Best?
-
Now Playing: DHA Pills have No Benefit for Alzheimer's Patients
-
Now Playing: The Dangers of Alcohol
-
Now Playing: Doctors Under-Reported Endoscopy Complications