While I'm here, some notes on what your child's immigration status will be when your child is born. Since it's safe to assume that neither you nor your partner are New Zealand citizens (given that you stated earlier that both of you are applying for Skilled Migrant Category Resident Visas), it all depends on whether the child is born before or after you are granted a residence-class visa:
If your child is born before your application is approved, your child will be automatically deemed to hold a temporary entry class visa; the type and duration being dependent on the temporary entry class visa held by you and your partner. It's recommended, but not strictly necessary, that you
request confirmation of your child's immigration status from INZ (no fee is charged for this). You'll probably want to contact INZ and have the child added to the SMC application in progress: if this doesn't happen for whatever reason, you'll need to make a separate application for a
Dependent Child Resident Visa (which can only be done once either you or your partner hold a residence class visa). Either way, you'll need to obtain a passport for the child (from one or both of your countries of origin) in order for the child to be granted a residence class visa.
If your child is born after your application is approved (i.e. either of you hold residence class visas at the time of birth), things are a lot more straightforward. The child will be considered a New Zealand citizen by birth per
Section 6(1)(b)(ii) of the Citizenship Act 1977 and cannot hold a visa for New Zealand (it's
legally prohibited, and would be superfluous anyway even if it were permissible); instead, you'll be able to apply for a New Zealand passport for the child. Depending on the citizenship laws of your countries of origin, you may also be able to register the child as a citizen by descent of those countries.