Impact of Maternal Age on Down Syndrome Risk
The age of the mother is one of the primary factors that contribute to an increased risk of Down syndrome. This is mainly attributed to the finite supply of eggs that a woman possesses. As a woman gets older, her eggs also age and may undergo deterioration over time. Consequently, the likelihood of Down syndrome in babies is expected to rise in the coming years due to more women choosing to have children at a later stage in life.
Although the father can also contribute to certain cases of Down syndrome, his age does not play a significant role in the probability of the condition developing.
Recurring Incidence of Down Syndrome in Siblings
When parents have one child with Down syndrome, the chances of having another child with the same condition significantly increase. This likelihood is even higher if the cause of Down syndrome in the first child was trisomy 21. However, the risk decreases in cases where the cell division error originated from the father’s side. Conversely, if the error occurred due to improper cell division in the egg, the probability of it recurring in future pregnancies is higher. Consulting with an OB/GYN or genetic counseling specialist will help determine the likelihood of having another child with Down syndrome based on your specific circumstances.