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.
Opening the door for 30 seconds can lead to temperature change of 5-10 degrees. It can then take up to 15 minutes for the fridge to return to its initial low temperature. Dairy products and drinks should be placed at the top of the refrigerator, cool but not too cold, so they do not freeze. Preferably, place milk and dairy products on the side where the cold air blows and position drinks on the other side. Meats and fish should be on the mid-tier shelf. Cheeses and cold cuts should be placed in the top drawer below the bottom shelf. Fruit and produce (salads and vegetables) can be in the middle of bottom drawer, still cool but not too cold so they do not freeze. One of these drawers usually has a humidity control.