Ballottement indicates an increase of fluid over the patella at the knee joint - this has more to do with an injury or infection and nothing to do with pregnancy.
Braxton Hicks or practice contractions are uterine contractions not usually felt until the second trimester or third trimester of pregnancy - the only cause of Braxton Hicks is pregnancy.
Chadwick's sign is a bluish discoloration of the cervix, vagina, and labia caused by the hormone estrogen, its presence is an early sign of pregnancy.
Goodell's Sign is a softening of the cervix and vagina - an indication of pregnancy.
Hegar's sign is a softening at the cervix (lower end) and the fundus (top of) the uterus - an indication of pregnancy.
While similar conditions may have alternative causes - Braxton Hick's, Chadwick's, Goodell's and Hegar's are all found in pregnancy.
(Properly, alternative is a choice between exactly two options. However, because there may be more than one pair of options,alternative has come to be used colloquially to mean a choice between two or more. Similarly, alternatives is often used to indicate more than two possible courses of action.)To reduce pollution, we need alternative sources of energy.The alternative to a jury trial is a bench trial, where guilt is decided by the judge.He did not want to sell the farm, but he had no alternative.
An alternative resource, just as the term implies is a source of something which is different from the most common source. For example the most common source of automotive fuel is fossil fuels pumped from the ground, however it is possible to make automotive fuel from corn oil or from sugar. These would be alternative resources. These will help people in the future!
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