Congratulations but you should also note there risks accompanied by such. We clearly see a decline in the probability of pregnancy with age. For a woman in her early 40s, the probability of pregnancy—whether or not she is undergoing fertility treatment—is about half that of a woman 10 years younger. If the average miscarriage rate is 20 percent. The risk is closer to 25 percent for a woman in her 40s. Diabetes Older moms are at greater risk of developing gestational diabetes because their endocrine systems aren’t quite as resilient as younger women’s. All the body systems that pregnancy normally impacts get impacted a little more with age. For example, the extra weight gained during pregnancy may take a greater toll on an older woman’s musculoskeletal system, causing more back and muscle aches. Fetal growth restriction, which occurs when blood flow to the fetus is reduced, is more common among older moms. That’s because as a woman ages, her circulatory system becomes less robust, so she may not deliver as much blood to the uterus and placenta.