Every mother-to-be who has what is considered an ‘at-risk’ pregnancy is informed of the risks to the fetus of a genetic abnormality. ‘At-risk’ can involve a long list of medical conditions (diabetes or cancer for example) or poor health choices (illegal drug use or smoking). Yet a common cause of an at-risk pregnancy is age, having a child before the age of 17 or older than 35. In the US, no less than 750,000 are considered at-risk.