Month of Onset of the Chorea.
—The available material has been carefully studied with respect to the month of pregnancy in which the chorea first manifested itself. Data on this subject were available in 670 cases. The choreic attack preceded the pregnancy in 38 cases. It developed in the first trimester in 312 cases, in the second in 219 cases and in the third in 101 cases, including 2 cases in which the attack began during labor and 1 case in which it began on the second day post partum. The distribution of the onset by months is graphically indicated in chart 4. By a rather rough approximation, it will be seen that one half of the attacks are initiated in the first trimester, one-third in the second and one-sixth in the third.
Duration of the Attack and Time of Recovery or
WILLSON P, PREECE AA. CHOREA GRAVIDARUM: A STATISTICAL STUDY OF 951 COLLECTED CASES, 846 FROM THE LITERATURE AND 105 PREVIOUSLY UNREPORTED. Arch Intern Med (Chic). 1932;49(4):671–697. doi:10.1001/archinte.1932.00150110134008
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