These 12 Heartbreaking Parenting Stories From 2017 Will Make You Squeeze Your Loved Ones Tighter

After losing their 10-year-old daughter, Olivia Hope Dennis, to a fatal asthma attack, Lisa and Lee Dennis made a heartbreaking video to warn parents of just how dangerous an untreated asthma attack can be. Lisa cautioned parents about the danger of taking breathing issues lightly, saying, "Everyone needs to look at their children — especially anyone with an inhaler — because asthma is a killer. And I think doctors need to recognize that and make families aware because this is serious, desperately serious."

Gijanelle Fowler's decision to leave her 1-year-old infant in the car while getting her hair done proved fatal. The mother had reportedly left the car running with the air conditioner on for six hours straight while attending a hair appointment without checking on her baby once. To make matters worse, she waited too long to call for help after finding out the car's battery had died. Sadly, it was too late, and the baby passed away from heatstroke.

In a now-private Facebook post, a mother in mourning cautioned others about the dangers of putting babies to sleep with blankets in their cribs before they turn a year old. "You never think it will be your baby," she warned. "Please do not put your baby to bed with a blanket. Please. He was 7 months old. I thought because he was crawling, standing on his own, and climbing that he would be fine with a blanket."

Jillian Johnson opened up about losing her newborn son, Landon, after he became dehydrated and went into cardiac arrest from not getting enough breast milk. Although Jillian believed "breast is best" at the time, she wishes more than anything she could do it all over again and supplement with formula. "The best advice I was given by one of his NICU doctors while he was on life support is 'Sure breast is best, but follow with the bottle,'" she wrote. "This way you know your baby has eaten enough. If only I could go back in time."

After getting the news that their 9-year-old son, Jacob, would likely not survive through Christmas, his family sprung into action by asking the community for one thing: as many Christmas cards addressed to their dying son as possible. Strangers from around the world followed through, and Jacob received thousands of cards before passing away on Nov. 19.

If there's one word to describe Carrie DeKlyen's story, it's tragic. The pregnant mother of five refused to undergo cancer treatment so she could give her sixth child a chance at life. After delivering her daughter, whom the family named Life, at only 24 weeks gestation, Carrie passed away. And to make matters so much worse, Life passed away after spending 11 days at the hospital. The family shared the news in a devastating statement on their Facebook page: "It is with great sadness and a absolutely broken heart that I tell you Life Lynn passed away last night. Carrie is now rocking her baby girl. I have no explanation of why this happened, but I do know Jesus loves us and someday we will know why. The grief we feel is almost unbearable, please be praying for our family."

Sara Chivers, a mother of two with terminal brain cancer, decided to write her sons a gut-wrenching letter that they can cherish together long after she's gone. And if that's not sad enough, Sara's 18-month-old son, Alfie, was also diagnosed with a rare, aggressive form of brain cancer. Tears are rolling down our faces just thinking about their situation.

Peter Howarth, a father from Manchester, UK, warned other parents about the danger of sepsis — or life-threatening blood poisoning that can result as a complication after an infection — after his 3-year-old daughter, Pippa, died from the illness in 2014.