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Results for “Fertility--statistics”

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At least 19 recordsLinked to original sources
PubMed1990

Correlation of computerized semen analysis with successful fertilization of oocytes in an in vitro fertilization program.

Sixty-nine couples enrolled in 123 in vitro fertilization-embryo transfer cycles were categorized by percentage fertilization; the results of categorization were compared with those of computerized semen analysis carried out with the CellSoft semen analyzer. Four groups were established: group 1 had 75% fertilization or greater; group 2 had 34% to 74% fertilization; group 3 had 1% to 33% fertilization; and group 4 had 0% fertilization. Statistical differences in certain semen parameters (motility, linearity, and straight-line velocity) were found comparing groups 1 and 3 using the initial ejaculate. A significant number of patients in group 1 had all normal semen parameters, but no statistical difference could be found in group 3 or 4 because of variations in specific abnormal parameters in the groups. When the straight-line velocity-motile density (SLVMD) calculation was used, a significant difference was seen between group 1 and group 3 and between group 1 and group 4 (p less than 0.01); 65% of group 3 and 76% of group 4 had an abnormal SLVMD. SLVMD is a useful calculation to predict fertilization rates in vitro from the initial ejaculate.

Computers↗
PubMed1987

[Population genetic study of differential fertility in man (illustrated by habitual abortion). V. Distribution of individual heterozygosity and parameters of genotypic variability for a set of immunological genetic markers].

Distribution of individual heterozygosity (the number of heterozygous loci per individual), frequencies of genotypes formed by paired combinations of 5 loci and values of linkage disequilibrium between 6 blood group loci were studied both in a group of couples and single women with recurrent abortions in anamnesis, and in a group of couples and single women with normal fertility. Statistically significant deficit of highly heterozygous individuals was found in the experimental group. Marked increase of genetical variability was shown for the women with repeated abortions, as a consequence of elevation of rare genotypic paired combination frequency. Therefore, differential fertility as a component of stabilizing selection alters the distribution of complex genotypes in human populations. Differences in values of linkage disequilibrium between women with repeated abortions and those of normal fertility were not found.

Abortion, Habitual↗
PubMed1977

Fertility and family planning in Hungary.

Hungary's birth rate has been declining fairly steadily since World War II, and Hungarian population policy is aimed at increasing fertility to at least replacement level through social, health, and economic benefits to encourage childbearing. Figures for the mid-1970s indicate that birth rates have been rising. Whether these recorded increases may be permanent is examined through analyses of data on Hungarian fertility since 1900 and through retrospective and prospective surveys of family planning attitudes and practice. Both fertility statistics and surveys of family-size desires document a trend toward the two-child family and a birth rate too low to achieve the desired net reproduction rate of more than one. The surveys also show that family planning has become more prevalent in recent decades, and previously heavy reliance on abortion and traditional contraception is increasingly giving way to use of modern contraceptives.

Abortion, Induced↗
PubMed1990

Conception delay after oral contraceptive use: the effect of estrogen dose.

A significant delay was observed in conception among 248 former oral contraceptive (OC) users compared with women discontinuing other methods of contraception (n = 1,365). The mean time to conception was 5.88 cycles (95% confidence interval [CI] 5.38, 6.38) for former OC users and 3.64 cycles (95% CI 3.49, 3.79) after other contraceptives. Women discontinuing OCs with higher doses of estrogen (greater than or equal to 50 micrograms) had greater conception delays than those on lower estrogen doses who, in turn, had longer delays than other method users. Oral contraceptive use was associated with significant reductions in conception for each of the first six cycles after discontinuation. This study provides further evidence for a direct effect of oral contraception on delayed conception, suggests that the delay lasts longer than previously thought, and finds that the probability of conception after OC discontinuation depends on the estrogen dose of the OC.

Adolescent↗
PubMedDate not supplied

Fertility conditions in Gondar, northwestern Ethiopia: an appraisal of current status.

In order to study current fertility conditions, this study examines the sociocultural, economic, and demographic characteristics of 734 women aged 15-55 in the Gondar administrative region of northwestern Ethiopia. Women over age 45 in the sample were found to have, on average, 7.27 pregnancies, 0.88 abortions, 6.39 children ever-born, 1.51 child deaths, and 4.88 live offspring. The total infertility rate was 8.5 percent, and the subfertility rate was 12.7 percent. Fertility levels in the region were relatively high, compared to other developing countries. Contraceptive use was estimated at 3.6 per 1,000 women (for ages 15-49). The need for more effective family planning services is strongly indicated. The study suggests that, among other goals, policy efforts should focus on the reduction of unintended conception and unwanted fertility.

Adolescent↗