The students also over-estimated the success of IVF, even more so than the Israeli students.
Health science students didn't necessarily have better fertility awareness and nurses were the most over-optimistic about how easy it would be to conceive, the study found.
Students who got the closest to the medical data were - unsurprisingly - those who'd studied a reproductive biology class.
Study author Nathanael Lucas, who's a fifth-year medical student, said the tendency of students to over-estimate how easy it would be to get pregnant was a concern.
"University students have the challenge of balancing a career with starting a family, and as a result, planned pregnancies are often delayed until later in life.
"It is imperative that that these students, and the general public, are educated about an ageing woman's fertility."
Almost 700 Auckland University students, with an average age of 22.3 years, from a range of disciplines and ethnic backgrounds were questioned for the study.
Storks in their eyes
• 5.2 per cent already parents
• 87 per cent want to be parents in the future
• 10 per cent don't want to be parents
• 28.6 considered the ideal age to be a parent
Source: Auckland University.