About 25,000 women take the pills affected.
Study leader professor Kristen Kjerulff said it was unclear if their results were due to maternal choice or a lower rate of conception.
"She was guilty of the one neglect that mars many marriages."
Only use that rolling pin for making sourdough.
Almost a quarter of women in a recent survey said they have missed school or work because they were unable to afford sanitary items.
"Making women's hygiene products accessible to all Kiwis."
"Sperm would need to be more 'adjacent' to a vagina than simply in a large pool of water."
The DIY trend has medical experts worried.
The much-ridiculed product could lead to medical conditions.