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Results for “Fecundability”

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At least 919 records · Page 51Linked to original sources
PubMed2004

Comparison of fecundity after second laparotomy for endometriosis to in vitro fertilization and embryo transfer.

OBJECTIVE: To study the prognosis for conception subsequent to a second conservative laparotomy for infertile patients with moderate and severe endometriosis, compared with the reproductive outcome of one cycle of in vitro fertilization and embryo transfer (IVF-ET). MATERIAL AND METHOD: From January 1990 to February 2000, 190 infertile patients had initial conservative laparotomy for pelvic endometriosis at a university hospital. All of these patients had moderate or severe endometriosis. After the failure of the initial operation to restore fertility, 32 patients requested the second operation while 24 patients underwent one cycle of IVF-ET. The cumulative pregnancy rate after the second operation was compared with the clinical pregnancy rate after one cycle of IVF-ET. RESULT: The cumulative pregnancy rate following the reoperation was 20.5% within 1 year with no additional increase in 2 and 3 years of follow up. The clinical pregnancy rate per stimulation of one cycle of IVF-ET was 12.5%. There was no statistically significant difference (P = 0.54). CONCLUSION: Despite a trend toward a higher cumulative pregnancy rate following the second conservative laparotomy, there was no statistically significant difference, when compared with one cycle of IVF-ET in moderate and severe endometriosis-associated infertile patients who had not conceived after the initial operation.

Adult↗
PubMed2004

Fecundity of Ochlerotatus albifasciatus from Córdoba, Argentina.

Seasonal differences in the number and length of gonotrophic cycles of Ochlerotatus albifasciatus were determined in a temperate area of Argentina, in addition to analysis on number of eggs laid by females corresponding to the number of bloodfeedings per gonotrophic cycle throughout the year. Landing females were collected by using human bait and mechanical aspirators along the southwestern coast of Mar Chiquita Lake (in northeastern Córdoba Province) from February to November 2000. Collected females were kept in captivity under natural weather conditions, fed on a sugar solution (10%), and provided blood via a human host by different methods (treatment A: 1 bloodfeeding/gonotrophic cycle and treatment B: 2 or 3 bloodfeedings/gonotrophic cycle). A maximum of 5 gonotrophic cycles (average 2.24 +/- 1.11) were determined by dissecting ovarioles. The gonotrophic cycles were longer in females of treatment B (11.23 +/- 4.06 days) than those of treatment A (9.02 +/- 5 days). Females that completed the highest number of cycles were collected in winter and during the beginning of spring. The average number of eggs laid in each cycle was 90 (SD = 37.85) for treatment B females and 80 (SD = 29.99) for those of treatment A, with significant differences between treatments. Considering both treatments, the number of eggs laid was significantly higher after 3 blood meals than with 1 or 2 feedings. These results suggest that an increase in the number of feedings would lengthen the cycle and increase the production of eggs. No correlation was found relating to temperature and the length of the cycles, which suggests that the number of blood meals may be the determining factor in seasonal variations in egg production.

Animals↗