[Reproductive disorders in cattle and sows caused by phosphorus deficiency].
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Chromosome studies in married couples were performed in order to elucidate their infertility, spontaneous abortions and foetal wastage. Peripheral blood lymphocyte metaphases of 311 persons revealed chromosomal abnormalities in 26 married people. Chromosome aberrations found here were distributed among sex chromosome aneuploidy (complete and mosaic form), structural anomalies of the Y chromosome, autosomal chromosome aneuploidy (mosaic form), and balanced autosomal translocations (complete and mosaic forms). Chromosomal structural variants were observed in chromosome A-1 (1qh +) in one person and in acrocentric chromosomes in 21 persons. They consisted mainly in elongated secondary constriction (NOR) and in large or very large satellites. The acrocentric association frequencies per metaphase were strongly increased in a group of probands carrying acrocentric variants. Their significance awaits further study.
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The correct use of hormones in genesiological cases is discussed with indications for their use, dosage levels and duration of treatment under the following groups, viz. hypothalamic hormones, hypophyseal hormones, other gonadotrophins, steroids, combinations of the foregoing and prostaglandins. The more important dangers associated with hormone therapy are then briefly discussed with a few examples of the more common and hazardous abuses.
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The authors examined in serum of 121 women, using the ELISA method, anticardiolipine antibodies (ACA) class IgG and IgM. The examined women were divided into a group of women with a normal pregnancy (n = 14), a group of women with imminent abortion during the first trimester (n = 10) and a group of women treated for prolonged periods on account of sterility (n = 97). In women with a normal pregnancy only in one a positive titre in the IgG class was recorded. In the group with imminent abortion a positive ACA titre was found in three patients (30%); in women with negative results of the ACA examination, pregnancy continued. In sterile women positive ACA tests were recorded in 14.5%.
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Data collection related to production performances and health parameters was developed in 31 intensive pig farms in Portugal (from 100-800 sows each) in 1,580 of 10,000 sows over 7 yr (1985-1992). Using prospective surveys and subsequent preventive veterinary medicine programs in pig farms, we demonstrated the value of risk-factor analysis in the improvement of production performances: an increase in litter size from 9.15 piglets born/litter (sd 2.93) to 13.4 (sd 2.13); an increase in number of weaned piglets per sow per year: 15.73 (sd 1.93) to 20.46 (sd 1.92); and a decrease in returns to oestrus (25.3 to 2.3%).