Fertility Blog

Infertility Study Sounds Warning Bell

A recent report published in the journal Fertility and Sterility finds that more individuals may face infertility in their late 30s than previously thought. The study stems from the well-known Dunedin Multidisciplinary Health and Development Study. It has closely followed a group of people born in Dunedin, New Zealand, in the early 1970s.

In the study, one in four women and one in five men experienced fertility challenges by their late 30s. Although male infertility has been known to decline beginning at age 40, this study was unique in showing the trend starting earlier.

The researchers report these statistics in the setting of a growing trend: delaying parenthood well past age 30. Freezing eggs and embryos is one approach some are now trying. It provides a promising “insurance policy” for many against age-related infertility.


Van Roode T et al. Fertility and Sterility. Published online: January 26, 2015.

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