Yes, having a new baby is beautiful, but it also creates a domino effect that impacts every other area of your life, most notably the relationship with your significant other. No one ever really tells you that. So here's the truth that baby commercials and family shows never really cover: Your newborn tests you and your relationship. Here's how: 1. Crazy sleep deprivation Staying up all night with a newborn is CRAZY. And your partner is likely very sleep-deprived, too, making for the perfect storm.