BIOLOGICAL CLOCK THREATENS FERTILITY.

A woman's reproductive system ages faster than the rest of her body. In females older than 35, infertility most often is caused not by abnormalities, but by changes in the ovaries as they age, indicates the Mayo Clinic Women's Health-Source.

The quality of her eggs is the primary barrier to pregnancy in older women. Older eggs are less capable of being fertilized and more prone to chromosomal problems, which lead to an increased risk of miscarriage and fetal genetic disorders. Although advanced fertility treatments such as in vitro...