Now Playing: 4 ways to ditch the babysitter and work out with your kids
Now Playing: Long lingering pesticides may increase risk for autism: Study
Now Playing: Consumer Reports claims heavy metals were found in popular baby foods
Now Playing: Health groups push for stricter FDA regulations on e-cigarette liquids
Now Playing: Work out like Jennifer Aniston with these 10 moves from her boxing trainer

vCard.red is a free platform for creating a mobile-friendly digital business cards. You can easily create a vCard and generate a QR code for it, allowing others to scan and save your contact details instantly.
The platform allows you to display contact information, social media links, services, and products all in one shareable link. Optional features include appointment scheduling, WhatsApp-based storefronts, media galleries, and custom design options.
Now Playing: Sleep loss can make people more isolated and lonely: Study
Now Playing: Gabrielle Union speaks out about adenomyosis diagnosis
Now Playing: Young children talking back and forth with adults strengthens brain language region
Now Playing: FDA allows marketing of contraceptive app for the 1st time
Now Playing: FDA approves marketing for a contraception app for the 1st time
Now Playing: Jennifer Aniston’s workout secrets revealed
Now Playing: Are the new guidelines on salt intake too extreme?
Now Playing: Boxers or briefs? Largest-ever study shows boxers may beat briefs for baby-making
Now Playing: Low-calorie diets affect men’s and women’s bodies differently, study shows
Now Playing: Opioids after wisdom teeth removal might set young people up for addiction
Now Playing: 92-year-old doctor shares her secrets to a long and happy life
Now Playing: Does a doctor’s gender affect women’s survival rates after a heart attack?
Now Playing: Secondhand smoke more dangerous for teens: Study
Now Playing: Living in the city may not be heart healthy: Study
Now Playing: Is it safe to breastfeed while drinking alcohol?