"Nothing shook our family like my teenage daughter's pregnancy," says Andrea*, 53, a Washington-based mom of three. And she's not alone. Even though there have been tremendous declines in teen pregnancy, almost three in 10 girls get pregnant in the U.S. before age 20. As part of National Teen Pregnancy Prevention Month, Family Circle will shine a light on sex stats that will surprise you, offer expert advice every parent must hear and share stories of the most vulnerable group of teens—they’re not who you think—starting with Andrea's daughter. One August morning, Andrea Richards, a mom of three, climbed out of bed and made her way downstairs to find a letter sitting on the table. It was from her daughter, Kate, and the message would send her frantically rushing back upstairs to wake her husband. Kate was three months pregnant. She didn’t know how else to break the news to them. And she had packed up and left home in the middle of the night. “I was devastated,” says Andrea, who was 45 at the time. “Kate was an honor student. All the hopes and dreams of her going to college were gone.” Those dreams were just weeks away from being realized: Kate was 18, working a part-time job in retail and slated to start community college in the fall. STILL AT RISK Two-thirds of all teen pregnancies occur in 18- and 19-year-olds, according to research done by The National Campaign to Prevent Teen and Unplanned Pregnancy (TNC). That’s right, older kids. “Many people find that surprising because they might be more accustomed to seeing images of girls in the media who are 14, 15 or 16 and pregnant,” says Marisa Nightingale, senior media advisor for The National Campaign. “But the average age for sex is 17 for boys and girls. So 18- and 19-year-olds are more likely to be sexually active. And nothing magical happens overnight when someone turns 18 that makes them less likely to get pregnant or better at using contraception.” Before you start to wonder if the numbers are skewed toward teens who get hitched after graduation, let’s dispel that notion. The vast majority (86%) of all births to 18- and 19-year-olds were to unmarried women, according to the Centers for Disease Control. So we’re talking about teens who have just nabbed their first job or already gotten an acceptance letter from college, or they may be making their way through freshman year. But in one pivotal moment, the blank slate of their future—and likely yours, mom, as well—now has something permanently written on it. For Kate, that pivotal moment was on prom night. “I didn’t suspect this with her at all. We had everything in order,” says Andrea, who shares that her daughter was "in love with love" and dating a boy she and her husband didn’t approve of. They kept close tabs on her. “We drove Kate to prom. We knew where she was going to be. She even called me at midnight and asked if she could spend the night at a friend’s house. I said no. Curfew was 2 a.m.,” remembers Andrea. “So whatever decision Kate made between midnight and 2:15 a.m., when she walked in the door to our home, changed her life forever.” FINDING THE WORDS “I told Kate that I hoped she wouldn’t have sex with someone until she was old enough and ready. I was never going to take her to get contraception because it was never okay to have sex before you were married,” explains Andrea. She says she had plenty of “sex talks” with her daughter, who was raised with the family’s Catholic beliefs, and was devastated that she and her husband were the last to find out their daughter was pregnant. “Other kids knew. Other parents knew. No one said anything. Things would’ve been quite different if someone had told us. We would’ve sat down and talked to Kate. She didn’t have to leave the house. We wouldn’t have wanted her to do that.” Not only does the “sex talk” need to be an ongoing conversation with your child, experts suggest that it also needs to be a broad conversation. “You’re trying to build sexual confidence,” explains John Chirban, a clinical instructor in psychology at Harvard Medical School and author of How to Talk with Your Kids About Sex. He points out that this isn’t about just having the strength to say no, but also accepting all the potential consequences of saying yes...and what can happen next. “It’s role-playing, talking about incidents and teaching your child to direct and manage their sexuality. As a parent, it’s incredibly important to own your point of view and be true to what’s spiritually or religiously correct,” says Chirban, a father of three. “But just saying no doesn’t respond to what a teenager is feeling in the heat of the moment in a relationship.” At the same time, saying yes has consequences that extend way beyond those two teens. GOING FORWARD Today Kate lives in another state and is engaged to be married—but not to the father of her now-8-year-old daughter. Andrea’s relationship with Kate is much improved and she absolutely adores her granddaughter. Still, everything that's happened since she found that note hasn't been easy. “This isn't a club I would’ve wanted to join," says Andrea. "But things are turning out okay today.” One message that she wants other moms to hear: “It’s a hard road, but believe me, you have enough love for your daughter and grandchild to pull through.” *Names have been changed. Lynya Floyd is the health director at Family Circle magazine. Read more of her posts here. Has your child ever had a pregnancy scare? Post a comment and share what happened.