Birth defects or genetic disorders can also be caused by a problem with the number or structure of chromosomes. Usually this results in multiple body systems being affected. Approximately 1% of all babies will be born with chromosomal abnormality, which can cause physical problems and mental retardation. 2  More than 20% of infant deaths are caused by birth defects or genetic conditions (e.g. congenital heart defects, abnormalities of the nervous system, or chromosomal abnormalities).
We tend to put the fridge on at least 24 hours before departure. How quickly it gets cool can be influenced by the ambient temperature. Although it should cool down overnight. If you don't think its getting cold enough on mains it might be worth trying to cool it down initially on gas.
To measure the temperature: 1  Fridge: put the thermometer in a glass of water. 2  Check the temperature during the first door opening after not using the fridge for 8 hours or more (such as overnight). 3  Freezer: put thermometer between two bags of vegetables and as above check after 8 hours or more.he Knowhow. 1  A fridge should have a temperature of between 37Â°F(3Â°C) and 40Â°F (5Â°C). 2  Any higher and the food will go off, any lower and youâll lose nutrients and fresh food can be ruined.