Understanding Egg Quality and Egg Quantity

The decline in fertility as we age is almost entirely a result of the decline in egg quantity and quality. We know this because older women who use donor eggs have pregnancy rates similar to younger women. But what does egg quality mean? Broadly, it describes the potential of an egg to become a viable pregnancy after fertilization. And this is no trivial matter – the vast majority of fertilized eggs simply do not have what it takes. Read more