Sure. Is it ethical to force a sentience into this world (without asking it), then forcing it to live strictly by your rules for the next 18 years? To bring that sentience into a world which it will inevitably wither and die and lose everything dear to it, because it exists in a frail organic shell?

Consent is critical, and I don't think any life-event breaches consent more than existing in the first place. I do not think having children is a good thing, morally speaking. It is not possible to obtain the consent of a being before it exists - as such, the best route is to not bring said being into existence in the first place.