Insights on Age-Related Fertility Decline Mechanisms – Healthspan
Healthspan shared a post on LinkedIn:
“For decades, scientists have attributed the decline in fertility after age 35 mainly to chromosomal errors in aging eggs. Yet new evidence suggests the process begins earlier – and within the cellular machinery that maintains egg quality and longevity.
A new study examined the use of rapamycin, a compound long studied in longevity research, in women undergoing IVF. The results were notable: short-term, low-dose rapamycin doubled the success rate of IVF compared with standard protocols.
The study also traced the biology behind this improvement, showing that as women reach their mid-30s, ovarian cells begin to overproduce proteins while their repair and recycling systems slow – an imbalance that gradually undermines egg quality.
For researchers in the field of aging, this pattern of overactivity in cellular growth machinery reflects a familiar signature seen across multiple tissues. Once again, the mTOR pathway – long associated with the acceleration of aging – appears to play a central role, this time within the ovary.
Taken together, these findings offer a new perspective on reproductive aging. Fertility loss after 35 may reflect not only a depletion of eggs, but also a cellular shift toward growth at the expense of repair – a process that appears more amenable to intervention than once thought.
In this week’s Research Review, we examine the details of this study, exploring its methods, results, and implications for reproductive longevity, IVF outcomes, and the broader biology of aging – where the same imbalance between growth and repair drives decline across nearly every tissue system in the body.
Read the full review here.”
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