 It is becoming increasingly routine to test fetuses for a variety of genetic and other anomalies. Ultrasound screening for various morphological anomalies and the Maternal Serum Alpha-Fetoprotein Test (MSAFP) that screens for trisomy chromosomal disorders such as Down syndrome are routine parts of prenatal care; indeed, ultrasound screening does not even require formal informed consent from patients. Other tests such as amniocentesis (which diagnoses rather than screens for trisomy disorders) and genetic testing for Tay-Sachs disease are common. More arcane tests are available, and it seems clear that the range of conditions and traits for which prenatal testing is possible will continue to grow rapidly. The rise in prenatal testing allows parents and society at large new forms of control over what sorts of children are born, and it enhances the level of medicalization and surveillance during pregnancy. These tests raise a variety of ethical issues.