Key points are not available for this paper at this time.
(1963). Periodontal Disease in Pregnancy I. Prevalence and Severity. Acta Odontologica Scandinavica: Vol. 21, No. 6, pp. 533-551.
Löe et al. (Tue,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: