From what I can see on the official NZ Department of Immigration website you partner's visa will be granted for the duration of your course, provided you can produce all the documents to support the visa application. If your course is three years long and you have a student visa for that period of time, hers should be granted for the same period of time.
I am afraid I can't find any concrete information regarding what would happen if you guys were to have a child over in New Zealand. You should maybe contact an immigration specialist to check this out.
For more info read the Visas for New Zealand page.
Expat Health Insurance
Cigna Global Health Insurance - 10% off any plans bought in November and December 2023
With Cigna, you won't have to rely on foreign public health care systems, which may not meet your needs. Cigna allows you to speak to a doctor on demand, for consultations or instant advice, wherever you are in the world. They also offer full cancer care across all levels of cover, and settle the cost of treatments directly with the provider. Cigna is currently offering a 10% discount for seniors (over 60) on their Silver package.
International Movers. Get Quotes. Compare Prices.
Sirelo has a network of more than 500 international removal companies that can move your furniture and possessions to your new home. By filling in a form, you’ll get up to 5 quotes from recommended movers. This service is free of charge and will help you select an international moving company that suits your needs and budget.