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The continuation rate at the end of this five-year clinical study was 60% with no accidental pregnancy occurring throughout the five years. The post-removal conception rate in women desiring pregnancy was 92% at the end of two years. The majority of acceptors described the overall experience with the implants as favourable. In fact, 75% of the women planning to use contraception after removal of the implants were going to use implants again.
An analysis of 9399 consecutive singleton births delivered at this unit is presented. The incidence of low birthweight (less than 2500 g) was 7.4%. Further analysis of the 698 low birth weight babies indicated that a variety of socio-demographic risk factors are operational in the etiology of low birthweight. Many of these are preventable before pregnancy so that the implementation of preventive Public Health measures utilising appropriate technology at least in developing countries may be socially and economically preferable to continued financial investment in intensive perinatal services.
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Sera from 896 healthy volunteers between 15 and 56 years old were tested in 1987-1991 for immunoglobulin G antibody against the hepatitis A virus (IgG anti-HAV). The overall seroprevalence rate of IgG anti-HAV was 27%: it increased from 0.9% in the 10-19 years age group to 48.1% in the 40-49 years age group and was 100% in subjects over 50 years. There was no difference in anti-HAV seroprevalence between the sexes (29% among men and 26% among women) and races. A downward trend in anti-HAV seroprevalence was seen from 1987 (33%) to 1991 (21.4%). The level of exposure to the hepatitis A virus has decreased when compared with data obtained in 1975 and 1984-1985. Hepatitis A virus infection is no longer an infection of children and adolescents locally.