Why did Wallace cut new replicant?

he was aiming to produce a reproducible replikant. Like Tyrell had with Rachel. And this new born apparently was not and so he retried it right there and then...

One thing that is for sure, is the guy had an enormous god complex. He was obsessed with finding Deckard and Rachael’s child because he wanted to create a new species of replicants by the millions. Bearing this in mind, one can assume Wallace was jealous of Tyrell’s achievement of having created a replicant that could reproduced, therefore when he realized his new “angel” was infertile, he felt frustrated, saw her as useless, and reinforced his delusions of being god by creating and eventually taking a life.

Wallace is a deeply mysterious character. How he even knew that this replicant was unable to reproduce is left up to interpretation (he probably got his answer when he first inspected her). At any event, this scene is harrowing.

Agreed, a completely and utterly pointless scene.

Wallace needed to be exposed as evil. So just lazy writing like in the rest of the movie.

This scene was a mess. I'm sure there was a cut scene where he reaches into the wound, into the womb, to root for a baby or baby making equipment. It was oddly out of place without anything like that.