- Cigna Medicare
- Individual & Family Plans
- International Plans
- Offered Cigna Through Work?
- Find a Doctor
- Informed on Reform
- Health and Wellness »
- Cigna Home Delivery Pharmacy
Multiple Pregnancy: Genetic Disorders and Birth Defects
Genetic disorders, such as Down syndrome or cystic fibrosis, and birth defects occur more frequently in multiple pregnancies than in pregnancies with one fetus. A group of deformities of the ankles and/or feet (clubfoot) is an example of a birth defect seen more commonly in multiple pregnancy.
Genetic disorders and birth defects occur more frequently in identical fetuses than in fraternal ones. In rare cases, problems occur when the genetic material (chromosomes) in the fertilized egg does not split evenly. This can result in severe mental or physical defects in one or more fetuses.
Conjoined (Siamese) twins occur rarely. This occurs when the egg does not split completely and the fetuses are partially joined.
Most doctors advise pregnant women to be screened for genetic disorders.
|Primary Medical Reviewer||Sarah Marshall, MD - Family Medicine|
|Specialist Medical Reviewer||William Gilbert, MD - Maternal and Fetal Medicine|
|Last Revised||July 8, 2011|
|By:||Healthwise Staff||Last Revised: July 8, 2011|
|Medical Review:||Sarah Marshall, MD - Family Medicine|
William Gilbert, MD - Maternal and Fetal Medicine
© 1995-, Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.