Men also have a 'biological clock' that affects IVF success: study

Monash University

New research finds older men are less likely to conceive with IVF, independent of their female partner's age.

Researchers analysed nearly 2500 cycles of 1506 Monash IVF patients experiencing unexplained infertility.

The study participants' chance of live birth decreased by 4.1 per cent with each year of increased male age.

Their chance of conceiving halved from the age of 50, compared with those under 40.

In 2018 the median age for fathers reached an all-time high of 33.5, according to ABS data.^{^[1]}

New research by Australian fertility experts has shown that IVF success rates drop as men age, debunking the myth that only women experience declining fertility as they get older.

The new study by researchers from Monash University and Monash IVF^{^[1]}found that in couples with unexplained infertility, increasing male age is associated with falling rates of live birth, clinical pregnancy and embryo implantation, while the miscarriage rates increase.

The male study participants' chance of live birth decreased by 4.1 per cent with each year of increased age, with outcomes significantly worse for men in their fifties.

In the study, the men's chance of conceiving halved from the age of 50, compared to those under 40.

Lead author and PhD candidate

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