In ancient times, abnormalities were seen as warnings or punishments from the gods. Even quite recently, it was believed that specific events during the pregnancy - such as being frightened by a mouse - would lead to specific defects in the baby, eg a mouse shaped birth mark. Such folk beliefs still persist in places. However, most defects that can be traced to a single cause have a genetic origin. This does not necessarily mean that the parents suffer from the same defect. It may be that they are carriers of the condition, or that the genetic problem occurred for the first time in the cells that gave rise to the baby. Known genetic causes account for about 25 per cent of all abnormalities.
What causes the other 75% of birth defects?
How can the 25% (by genetic causes) be prevented?
What part does 'cousin' marriages play in this?
http://www.netdoctor.co.uk/health_advice/facts/birthdefects.htm
2006-12-04
22:52:24
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6 answers
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asked by
kayamat_ka_din
3
in
Pregnancy