I cant express it based on codeing etc, but from observed ingame - yes it have a big impact on how tall your kids become.
I typically end up with Zlatka (Sturgia) and she is relative short, while my character is tall.
Typically the kid will be average or short.
Dont get me wrong there is some rng factors in play and I've had a "giant" with her aswell, typically though 1st born son, the 2nd born is average or shorter.
Daugthers on the other hand seems to be higher than average though.
On the other occasions where I've marred Apolonia(Sturgia), the kids tend to be average or tall, more typically tall.
As she is for a female "a giant" and typically rival above most male.