Scroll way down to the bottom of the Hot One Hundred top breeders and youll eventually find the United States, hovering just at replacement rate with 2.07 births per woman.
Most of the time, no apparent cause for night leg cramps can be identified. In general, night leg cramps are likely to be related to muscle fatigue and nerve problems. The risk of having night leg cramps increases with age. Pregnant women also have a higher likelihood of having night leg cramps. Several conditions, such as kidney failure and diabetic nerve damage, are known to cause night leg cramps. But if you have one of these, you're most likely aware of it and have symptoms other than night leg cramps.
Foot Cramps at Night. Foot cramps are forced spasms of the muscles that are painful and sometimes very intense. These can occur for few seconds to few minutes but are very unpleasant. Calf muscle cramps, toe cramps or primarily it occurs in arch of foot. Some of the primary causes includes medication, dehydration, fatigue, chemical deficiency etc. It is very common in night while one is sleeping and could occur during day too. Aged people are more likely to get this problem(people over 70-80).