I know that according to what was discussed in the Dwarf Commoner story, dwarves tend to struggle with having children?
It says here (under "sexuality") that their race have low birth rates.
And under the "Interspecies" sub-topic:-
"Interspecies relationships are possible, but frequently frowned upon by most societies. The fertility rate between two parents of different race are very low compared to that of the same race. In particular, elves are bound only to produce elven children with their own kind because their offspring with a human would be Elf-blooded, appearing physically human. Similarly this also happens with dwarves. Subsequently elves mating with humans is considered traitorous by the rest of their kind and any elf who conceives a child with a human risks expulsion from their community.
A child between a dwarf and a human is a half-dwarf, which would be taller than dwarves but shorter than humans. Such children are extremely rare, as dwarves are comparatively few in number and those living underground are reclusive to outsiders; mating with other species would bring great shame to the dwarf as well as their family. In addition, the dwarven fertility rate is very low due to the close proximity to the darkspawn taint for many generations.
Nobody in Thedas has any idea what a qunari half-breed might look like, since the Tamassrans prohibit interspecies mating among qunari and there is no evidence of interbreeding between Tal-Vashoth and other races."