Yes. So?
If this was a thread poking at the apparent deficiency the NH-29 has (an intentional one), I'd be able to relate. But you're pointing at an engineering problem on the level of the Yamataian.
Grab a yamataian man, have him get his intercourse with a nekovalkyrja, and I can guarantee his spooge will do its damnable best to make life happen, provided the neko 'mother' gives it something to work with.
That same yamataian man can totally make out and raise a family with a Yamataian female or a nepleslian female. The reverse is totally true. Yamataians likely breed true even with geshrins. Heck, works even with Elysians (in fact, it worked with the geshrins even before).
Your point, Ketsurui Zaibatsu recalling the Yamataian for
this - as the thread's subject displays - simply doesn't hold water.
However, if you actually meant that the nekovalkyrja is limited in childbearing, then yes, you are right. The NH-29 nekovalkyrja needs help to emulate childbirth in the manner humans understand it. However, the nekovalkyrja are totally capable of furthering the survival of their own 'species' via
parthogenesis - self-cloning. The NH-29, like many of its predecessors, can create a miniature version of herself inside her own womb (ex.: Kôsuka, a Ketsurui Samurai, gave birth to Kotori - the current commanding officer of the
YSS Miharu) which emerges after a few weeks and then takes a couple of months to grow to its adult-size with a very distinct persona to the original.