No matter the genetic predisposition of babies, establishing healthy sleep habits can build great resiliency in (and a more joyful relationship with) babies. So if no special effort is made to improve egg health before conception, I still take heart. Healthy sleep can do wonders for babies and mothers! When I cared for my first newborn, I thought he would just sleep, and I was in for a rocky three years. I learned on my second baby that they can sleep a lot if given the right conditions at the right time.
For the first three months of my babies' lives, I plan to pretty much never leave the house for more than 45 minutes at a time. That way, I am sure to be present at the baby's transition from sleep, to eating, playtime, and sleep again. (They can't stay awake for more than about 45 OR 90 minutes at a time. Putting them in bed when they are sleepy but still awake is so important for building sleep independence). I reference Polly Moore's book when this is relevant. I also value Happiest Baby on the Block (the movie was good enough for me). (This video from an Oprah show is also interesting for understanding newborn cries.)
Strategic swaddling is also critical for my children's self-soothing. Some swaddles are designed to improve self-soothing. I haven't tried them, but I'd be open to giving them a go. I learned this from one of my labor and delivery nurses, and it works great with my Aden and Anais blankets. It allows babies to keep their hands near their faces while preventing them from startling themselves awake. After 3-4 months, I like transitioning them to the Baby Merlin Magic Sleepsuit.