We all really know what's happening when a baby is growing. It's not that anybody actually believes it's just a few cells, they're just deceiving themselves because they have to. Non-sociopathic people can't just kill their own baby. They have to convince themselves of the lie that it's not a baby, that's it's nothing, then they can go have that "nothing" murdered.
The normal reaction to having a baby is not denial, it's excitement. That is why someone would be willing to pay money for an app that lets them track the progress of their baby's growth, to see when it's growing fingernails and what it's tiny little beating heart looks like.
This app has been consistently in the top spot in the iTunes medical category, and this one lets you watch your baby's development in 3D.
(I'm not trying to advertise anything, and I'm not getting paid to mention any specific apps, I just thought they were interesting.)