The baby on the home screen

I have the glow <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">nurture</a> app and I've noticed the baby on the home screen has not changed since about 12-13 weeks, I'm now 20 weeks. On all of my other apps it looks a lot different. Obviously it's not a really big deal, it's just fun to watch the progress.