نتایج جستجو برای: conception failure
تعداد نتایج: 395960 فیلتر نتایج به سال:
OBJECTIVE To identify reasons for inconsistent contraceptive use that antedate conception and continue to predispose participants in adolescent-oriented maternity programs to unsafe sexual practices after delivery. We hypothesized that teens who attributed their failure to use contraceptives before their first conception exclusively to concerns about their side effects and/or their own lack of ...
We compared daily urinary concentrations of oestrogen and progesterone metabolites in paired menstrual cycles (conception and non-conception) from 32 women. Volunteers with no known fertility problems were enrolled in the study at the time they began trying to become pregnant. They collected first-morning urine specimens and kept daily records of menstrual bleeding and sexual intercourse for 6 ...
The treatment of infertility has developed rapidly, and the anaesthetist may be involved in many aspects of the patient’s treatment, which may be complex. The harvesting of oocytes needs to take place within a defined period of time, or ovulation may have occurred and oocytes will be lost. Couples presenting for infertility treatment are generally anxious and often the women are emotional at th...
BACKGROUND During the past decade in the UK, only one in six cycles of assisted conception has resulted successfully in a live birth. Assisted hatching (AH) has been proposed to improve outcome. This systematic review of randomized controlled trials addresses primary outcomes of live birth, clinical pregnancy and embryo implantation. METHODS Trials on post-fertilization disruption of the zona...
background: although heterotopic gestation is common in assisted reproductive techniques, it is very rare in natural conception and clomiphene induced pregnancy. diagnosis and appropriate intervention of heterotopic pregnancy requires a high index of suspicious. case: in this paper a case of heterotopic pregnancy in a 30-year old woman with hemoperitoneum from ruptured tubal pregnancy with live...
For the current research the records of 62 farms in Isfahan province were available. To estimate genetic and phonotypic trends of reproductive traits such as age at first calving, calving interval, days open and number of insemination to conception rate the records of 63,866 cows including 167793 reproductive records were employed. Farms were covered by Vahdat industrial Agriculturists and Dair...
For the current research the records of 62 farms in Isfahan province were available. To estimate genetic and phonotypic trends of reproductive traits such as age at first calving, calving interval, days open and number of insemination to conception rate the records of 63,866 cows including 167793 reproductive records were employed. Farms were covered by Vahdat industrial Agriculturists and Dair...
OBJECTIVES To determine whether a history of a previous aneuploid conception increases the rate of aneuploidy among women having preimplantation diagnosis (PGD). METHODS Preimplantation embryos were tested for aneuploidy using FISH probes specific for chromosomes 13,15,16,17,18,21,22,X and Y. Using logistic regression to control for maternal age, we compared the rates of aneuploidy and other ...
Postpartum hemorrhage (PPH) is a frequent complication of pregnancy in India. Sheehan's description of postpartum hypopituitarism promoted the belief that PPH leads to necrosis of the enlarged pituitary gland of pregnancy and hypopituitarism. However, slow clinical progression suggests factors other than ischemia in its pathogenesis. Tissue necrosis could release sequestered antigens, triggerin...
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