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C Zouves

Publications and source records attributed to C Zouves.

At least 19 recordsLinked to original sources
PubMed2006

Wide range of chromosome abnormalities in the embryos of young egg donors.

Embryo chromosome studies show high rates of abnormalities, above 50%, but most embryos studied were from patients aged 35 and older. The objectives of this study were firstly, to evaluate the rate of chromosome abnormalities in embryos from young egg donors, and secondly, to compare the range of chromosome abnormality rates between donors and non-egg donor cycles, both undergoing preimplantation genetic diagnosis (PGD) for infertility using fluorescence in-situ hybridization analysis with probes for chromosomes X, Y, 13, 15, 16, 18, 21, and 22. On average, only 43% of the embryos were chromosomally normal, while the comparison group had euploidy rates between 34 (age group 18-34) (P < 0.001) and 21% (age group 40-45) (P < 0.001). There was considerable variation between donor cycles, with almost one-third having less than 30% normal embryos. Also, within donors and recipients repeating several IVF cycles with PGD, only 29-56% of the second PGD cycles had similar rates of normal embryos to the first cycle, while in the comparison group it was 64%. The results can explain why some egg donors are successful whereas others are not, and may also show that a policy of PGD for first time egg donors is appropriate and indicated.

Adolescent↗
PubMed2004

Predictability of preimplantation genetic diagnosis of aneuploidy and translocations on prospective attempts.

The aim of this study was to determine if the outcomes of aneuploidy and translocation testing by preimplantation genetic diagnosis (PGD) at the 8-cell stage have a predictive value for new genetic diagnosis cycles. In total, 83 cycles (39 patients) undergoing PGD of translocations and 378 cycles (176 patients) of aneuploidy were included. Predictability, defined as having similar rate (+/-20%) of euploid embryos in the first and successive cycles, was found in 66% of patients undergoing aneuploidy testing. Predictability was found significantly more often in patients undergoing PGD of translocations (90%, P = 0.006). In addition, patients with 0, <30 or > or =30% euploid embryos in the first cycle were compared and groups 0 and <30% had significantly fewer euploid embryos in the second cycle (22-26%) than those of the group with > or =30% (37%) (P < 0.05). Patients who did not become pregnant after the first attempt were stimulated more aggressively than those becoming pregnant, producing significantly more embryos in the second than in the first cycle (P < 0.001). Therefore, correlation between euploidy rate and pregnancy rate could not be assessed objectively between cycles. In conclusion, the PGD results of a first cycle can predict the results of the second cycle, but this is likely to be of more value when the condition investigated is translocation rather than aneuploidy. The chance of pregnancy is usually related to the number of euploid embryos.

Abortion, Habitual↗
PubMed1998

The use of combined heparin/aspirin and immunoglobulin G therapy in the treatment of in vitro fertilization patients with antithyroid antibodies.

PROBLEM: To compare the effect of heparin/aspirin therapy alone vs. heparin/aspirin in combination with intravenous immuno-globulin (IVIg) immunotherapy on in vitro fertilization (IVF) outcome of patients who test positive for antithyroid antibodies (ATAs). METHOD OF STUDY: Eighty-two women younger than 40 years of age whose infertility was related exclusively to female causes were evaluated. All tested positive for organ-specific antithyroid antibodies (antimicrosomal and/or antithyroglobulin antibodies), but negative for antiphospholipid antibodies. Thirty-seven of these women (group A) received H/A alone, whereas 45 (group B) received heparin/aspirin in combination with IVIg. RESULTS: Ten (27%) of women in group A and 23 (51%) of women in group B achieved live births after completion of a single IVF/embryo transfer cycle (P = 0.027). CONCLUSION: We conclude that IVIg therapy significantly improves IVF success rates in ATA+ women.

Adult↗
PubMed1998

A rational basis for the use of combined heparin/aspirin and IVIG immunotherapy in the treatment of recurrent IVF failure associated with antiphospholipid antibodies.

PROBLEMS: 1) Does the administration of heparin and aspirin (H/A) in combination with intravenous immunoglobulin G (IVIG) improve in vitro fertilization (IVF) implantation and birth rates in patients with recurrent IVF failure? 2) Is the effect of such treatment related to the antiphospholipid antibody (APA) status of the patients concerned? METHOD OF STUDY: Subjects consisted of 89 women younger than 36 years of age whose infertility was a result of causes other than male infertility and who had experienced four or more failed IVF/embryo transfer procedures. Fifty-two women were APA+ (group A), and 37 were APA- (group B). All patients, regardless of their APA status, received H/A (5000 U sq bid), aspirin (81 mg po qd) from the inception of menotropin therapy along with IVIG (20 g) through a single infusion 3 to 10 days before egg retrieval. RESULTS: Twenty-two (42%) of group A and 7 (19%) of group B patients achieved live births (P = 0.020). CONCLUSIONS: IVF outcome is significantly improved when H/A and IVIG are administered to APA+ women with repeat IVF failures. APA- women do not seem to benefit from such treatment.

Adult↗
PubMed1998

The selective use of heparin/aspirin therapy, alone or in combination with intravenous immunoglobulin G, in the management of antiphospholipid antibody-positive women undergoing in vitro fertilization.

PROBLEM: The effect of mini-dose heparin/aspirin (H/A) alone vs. combined intravenous immunoglobulin G (IVIg) and H/A on in vitro fertilization (IVF) birthrates in women who test seropositive for antiphospholipid antibodies (APA+) was evaluated, as was the question of whether outcome is influenced by the gammaglobulin isotype(s) or the phospholipid (PL) epitope(s) to which the APAs are directed. METHOD OF STUDY: A case-control study was conducted in three phases, spanning a 4-year period, in a multicenter clinical research environment. Six hundred eighty-seven APA+ women, who were younger than 40 years and who each, completed up to three consecutive IVF/embryo transfer cycles within a 12-month period, were given either H/A alone or H/A in combination with IVIg. Birthrates relative to the type of immunotherapy (i.e., H/A alone and H/A with IVIg) and APA profile were the main outcome measurements. RESULTS: In phase I, 687 women who tested APA+ to one or more PL epitopes underwent two or fewer IVF attempts for a total of 1050 IVF cycles. Four hundred seventy-seven (46%) births occurred in 923 IVF cycles in which H/A alone was administered. Twenty-two (17%) births occurred after 127 IVF cycles in which H/A was not administered. In phase II, 322 of 687 women tested positive for a single APA subtype. These subjects underwent up to two consecutive IVF attempts for a total of 521 IVF cycles while receiving H/A alone. The birthrate was significantly lower for women whose APAs were directed toward phosphatidylethanolamine (PE) or phosphatidylserine (PS) involving IgG or IgM isotypes than for women who had any other APA (17% vs. 43%). In phase III, 121 women who did not achieve live births after two consecutive IVF attempts in which H/A alone was administered received IVIg in combination with H/A during their third consecutive IVF cycle. The birth rate was 41% after these IVF cycles when anti-PS or anti-PE involving IgG or IgM isotypes were present, as compared with 17% when H/A alone was administered. The IVF outcome did not improve when IVIg was administered in association with any other single APA. CONCLUSIONS: The treatment of APA+ women with H/A alone improves IVF birthrates. This benefit is selective in that it does not apply in cases in which IgG- or IgM-related APAs are directed against PE or PS. In such cases, the addition of IVIg significantly improves the outcome.

Abortion, Habitual↗
PubMed1995

'Prolonged coasting': an effective method for preventing severe ovarian hyperstimulation syndrome in patients undergoing in-vitro fertilization.

Over a 4 year period ending 1 January 1995, 51 women scheduled for in-vitro fertilization (IVF) and embryo transfer were inadvertently severely overstimulated with menotrophins, as evidenced by the development of > 29 ovarian follicles in association with peak plasma oestradiol concentrations of > 6000 pg/ml. Accordingly, these women were at great risk of developing life-endangering complications associated with severe ovarian hyperstimulation syndrome (OHSS). Treatment involved withholding the administration of both menotrophins and human chorionic gonadotrophin for a number of days, while continuing gonadotrophin-releasing hormone agonist until the plasma oestradiol concentration fell to < 3000 pg/ml ('prolonged coasting'). The mean number of oocytes retrieved was 21.0, while the mean number of embryos transferred per procedure was 5.4. There were 21 clinical pregnancies (i.e. pregnancy rate of 41% per oocyte retrieval), 19 of which resulted in live births (i.e. a live birth rate of 37% per oocyte retrieval). Two pregnancies miscarried and there were four multiple gestations (three sets of twins and one set of triplets). None of the women developed severe OHSS. Prolonged coasting is an effective method of preventing the occurrence of severe OHSS without necessitating the cancellation of the IVF cycle or compromising success rates.

Adult↗
PubMed1994

High fecundity rates following in-vitro fertilization and embryo transfer in antiphospholipid antibody seropositive women treated with heparin and aspirin.

This study was undertaken to explore whether intervention with heparin and aspirin (H/A) in selected patients undergoing in-vitro fertilization (IVF) and embryo transfer could improve fecundity rates. Specifically, it explored the possibility that women diagnosed with organic pelvic disease who demonstrated antiphospholipid antibodies (APA) could benefit from H/A administration in a similar manner to that used in patients with recurrent pregnancy loss. We used an enzyme-linked immunosorbent assay for six different phospholipids to identify patients who expressed APA before they underwent IVF/embryo transfer. This study was confined to the first IVF/embryo transfer cycle that followed assessment of APA status and accordingly, the number of IVF/embryo transfer cycles corresponds with the number of patients treated. APA seropositive patients were treated with aspirin, 81 mg orally q.d., and heparin 5000 IU s.c. b.i.d., beginning on day 1 of controlled ovarian stimulation. The endpoint for success was a live birth or an ultrasound confirming fetal cardiac activity (a viable pregnancy). The prevalence of APA in patients diagnosed with organic pelvic disease (53%) was much higher than in those without female pathology (14%). The administration of H/A to APA seropositive patients significantly (P < 0.05) improved the viable pregnancy rate (49%) compared to the untreated APA seropositive group (16%). The viable pregnancy rate for APA seropositive women treated with H/A was also significantly (P < 0.001) higher than for untreated APA seronegative patients (27%). We conclude that all women undergoing IVF/embryo transfer should be tested for APA prior to initiating ovarian stimulation and those with APA seropositivity should be treated with H/A.

Adult↗
PubMed1993

Management of suboptimal sonographic endometrial patterns in patients undergoing in-vitro fertilization and embryo transfer.

A total of 816 women who underwent 1332 cycles of ovarian stimulation for in-vitro fertilization and embryo transfer (IVF/ET) had sonographic assessments of the endometrium within 2 days of oocyte retrieval. Endometrial linings were classified on the basis of thickness and echogenicity, using a grading system described previously. Grades I and IIB ('poor') were associated with a 6% viable pregnancy rate (advanced beyond 12 weeks' gestation) compared with a 29% rate for Grade IIA ('optimal'). In a subset of 112 women with poor endometrial linings during natural cycles, eight out of 21 women (38%) under 40 years of age developed optimal linings following ovarian stimulation with menotrophins, while 19 out of 91 women (21%) aged 41-45 years converted to optimal linings. Twenty-two out of 47 women (44%) who failed to develop optimal endometrial linings following ovarian stimulation converted to Grade IIA during subsequent cycles of exogenous oestrogen replacement. The financial, emotional, and physical burden associated with IVF/ET demands that patients with poor endometrial linings following ovarian stimulation with menotrophins be counselled with regard to either cancelling their cycles of treatment, or having their embryos cryopreserved for transfer to the uterus during a subsequent hormonal replacement cycle.

Adult↗
PubMed1993

High fecundity rates in donor oocyte recipients and in-vitro fertilization surrogates using parenteral oestradiol valerate.

Ovum donation and in-vitro fertilization (IVF) surrogacy can help couples with difficult infertility problems achieve pregnancy. Most centres using oral oestrogens and oestradiol patches report pregnancy rates in the range of 30% per cycle. Parenteral oestradiol valerate has pharmacological properties that make it an attractive option for preparing the endometrium in the recipients undergoing these procedures. When the egg providers were under age 35 years, and using oestradiol valerate in the recipients, we achieved a 61% clinical pregnancy rate in 62 cycles. These improved results suggest that parenteral oestradiol valerate should be used to prepare the endometrium in recipients, and that the hormonal milieu of the endometrium plays an important role in the higher implantation rates obtainable in ovum donor and IVF surrogate cycles.

Adult↗
PubMed1993

Eliminating the risk of life-endangering complications following overstimulation with menotropin fertility agents: a report on women undergoing in vitro fertilization and embryo transfer.

OBJECTIVE: To evaluate a new method for preventing the life-endangering complications associated with inadvertent menotropin-induced severe ovarian hyperstimulation in patients undergoing in vitro fertilization and embryo transfer (IVF-ET). METHODS: Seventeen women each underwent a single cycle of controlled ovarian hyperstimulation with menotropins in preparation for IVF-ET. The indications for IVF-ET were tubal occlusion in nine, endometriosis in six, and unexplained infertility in two. The peak plasma estradiol (E2) concentration before hCG administration was greater than 6000 pg/mL and more than 30 ovarian follicles were detected by transvaginal ultrasound. Thus, life-endangering complications associated with severe ovarian hyperstimulation syndrome were highly likely to occur following hCG administration. Rather than cancel the cycle of treatment, menotropin therapy was discontinued and hCG administration was deferred for a number of days until the plasma E2 concentration fell below 3000 pg/mL ("prolonged coasting"), whereupon hCG was administered and egg retrievals and ETs were duly performed. RESULTS: None of the women developed severe ovarian hyperstimulation syndrome. There were six viable pregnancies (35.2%), which proceeded normally. CONCLUSION: This study indicates that "prolonged coasting" prevents severe ovarian hyperstimulation syndrome in severely overstimulated women undergoing IVF-ET, without necessitating cycle cancellation.

Adult↗
PubMed1992

Laparoscopic surgical treatment of tubal pregnancy. A safe, effective alternative to laparotomy.

This study analyzed the intraoperative morbidity, postoperative course, postoperative hospital stay and fertility outcome in 216 consecutive tubal pregnancies treated with either laparoscopy (n = 98) or laparotomy (n = 118). Among the 98 cases treated with laparoscopy, the procedure was successfully completed in 95 (97%). In three cases laparotomy had to be performed to conclude the procedure. Retained trophoblast was observed in 3.8% of cases treated conservatively with laparoscopy and 1.3% of cases treated conservatively with laparotomy (P greater than .05). The total anesthesia time, amount of postoperative analgesia required and postoperative hospital stay were significantly less in cases treated with laparoscopy (P less than .001). The subsequent fertility outcome was similar in both groups. Laparoscopic treatment of tubal pregnancy is a safe and effective alternative to laparotomy, yielding similar fertility outcomes and requiring significantly less postoperative analgesia and a significantly shorter hospital stay.

British Columbia↗
PubMed1992

Heterotopic pregnancy associated with gamete intra-fallopian transfer.

Recent reports in the literature have focused on the increased risk of heterotopic pregnancy after the transfer of multiple concepti or oocytes. In an international collaborative patient registry between 1985 and 1989, 601 clinical pregnancies resulted from 2092 gamete intra-Fallopian transfer (GIFT) retrieval cycles. Five of the pregnancies were heterotopic (0.83%). After surgical intervention, all five cases of combined gestation resulted in live birth from intrauterine pregnancies. Routine vaginal ultrasonographic examination of the adnexa in patients who conceive after GIFT may help early diagnosis of heterotopic pregnancy. If the diagnosis is made early, conservative treatment may preserve the future fecundity of the patient and more intrauterine pregnancies may be salvaged.

Female↗
PubMed1991

The combined use of vibrostimulation and in vitro fertilization: successful pregnancy outcome from a retrograde specimen obtained from a spinal cord-injured male.

While pregnancies have been documented through the independent use of the vibrator method, from other methods of procuring ejaculate from spinal cord injured men, and from artificial insemination using a retrograde specimen, we believe that this is the first case report of a live birth resulting from a retrograde ejaculate obtained by vibration from a spinal cord-injured male whose partner underwent in vitro fertilization. Vibrostimulation may well be successful in the two-thirds of men whose spinal cord lesions are at the T10 neurological level and above, who have an intact bulbocavernosus reflex and anal tone but no pain or temperature sensation of the genitalia. Blood pressure monitoring, prevention of autonomic dysreflexia, alkalinization, dilution and infection control of urine, and retrograde specimen retrieval are all important techniques to ensure patient safety and optimal ejaculates. The timing of ovulation and insemination is the crucial factor for the partner of a SCI male whose sperm quality is poor. A complete gynecological workup, including studies of tubal patency, should be done before embarking on a series of artificial inseminations. Stimulation of ovulation and well-timed inseminations should optimize the chance of conception. Depending on semen analysis, female partner factors, and emotional and financial costs, IVF can appropriately be either an early or a final option.

Adult↗
PubMed1991

Tubal ectopic pregnancy after in vitro fertilization and embryo transfer: a role for proximal occlusion or salpingectomy after failed distal tubal surgery?

OBJECTIVE: To assess predisposing factors to tubal pregnancy after in vitro fertilization-embryo transfer (IVF-ET). DESIGN: Retrospective analysis of 891 ET cycles. SETTING: University-based IVF program. PATIENTS, PARTICIPANTS: All ET cycles performed in the study period were included; the indication for IVF was tubal factor in 640 (72%) and other (nontubal) factors in 251 (28%) cycles. INTERVENTIONS: None. MAIN OUTCOME MEASURE: Observing a higher than expected number of tubal pregnancies in our program; we examined subgroups to determine those at highest risk. RESULTS: Tubal pregnancies comprised 12% of clinical pregnancies in the tubal factor group but only 2.6% in the cycles nontubal factor group (P less than 0.05). Of 640 ET cycles in the tubal factor group, 359 were performed in patients who had prior tubal reconstructive surgery; tubal pregnancies comprised 15.6% of the clinical gestations in this subgroup. In the remainder of the tubal factor group (no prior tubal surgery), 281 ET cycles yielded a tubal pregnancy rate of only 5.5% (P less than 0.05). CONCLUSIONS: Women with prior reconstructive surgery for distal tubal disease are at highest risk of developing tubal pregnancy after IVF.

Adult↗
PubMed1991

The effect of embryo quality on subsequent pregnancy rates after in vitro fertilization.

OBJECTIVE: To determine if a simple morphological classification of embryos was predictive of subsequent pregnancy. DESIGN: Prospective case series. SETTING: University-based in vitro fertilization (IVF) program. PATIENTS, PARTICIPANTS: Consecutive embryo transfer (ET) cycles (n = 206). INTERVENTIONS: Embryos were classified into three grades: (1) equal-size blastomeres with no fragmentation; (2) unequal-size blastomeres; and (3) evidence of fragmentation. MAIN OUTCOME MEASURES: Embryo quality, age, indication for IVF, and stimulation protocol were evaluated for their effect on pregnancy rates (PR's). RESULTS: In cycles in which the best embryo transferred was grade 3, 2, or 1, the clinical PRs per ET were 0% (0/11 cycles), 12.8% (6/47 cycles, P less than 0.05), and 21.8% (32/148 cycles, P less than 0.05), respectively. When one, two, or three or more grade 1 embryos were replaced, the clinical PRs per ET were 15.6%, 16.3%, and 40% (P less than 0.05), respectively. Using logistic regression, embryo quality (P = 0.0011) and patient's age (P = 0.0044) were the only variables that affected PRs. CONCLUSION: The transfer of more than two good quality embryos had a positive effect, patient's age had a negative effect on PRs after IVF-ET.

Age Factors↗
PubMed1991

Hypospadias after assisted reproduction incorporating in vitro fertilization and gamete intrafallopian transfer.

OBJECTIVE: To determine incidence of hypospadias in infants born as a result of assisted reproductive technology (ART). DESIGN: Prospective data collection. SETTING: Parents with various forms of infertility attended an in-hospital in vitro fertilization program. PATIENTS: Two of the 53 male infants, conceived as a result of ART over a 3-year period, were born with hypospadias. INTERVENTIONS: Patient no. 1 underwent follicular stimulation (17 ampules of human menopausal gonadotropin (hMG), followed by 10,000 IU of human chorionic gonadotropin (hCG) 60 hours after the last hMG). Patient no. 2 underwent follicular stimulation with clomiphene citrate 100 mg/d from days 3 to 7, followed by 14 ampules of hMG starting day 6, and 10,000 IU of hCG 30 hours after her last hMG. MAIN OUTCOME MEASURES: All infants were examined in the immediate postpartum period for congenital anomalies. RESULTS: Infant no. 1, one of a set of dizygotic twins, had penoscrotal hypospadias, with normal renal sonogram and chromosomal studies. Infant no. 2 had glandular hypospadias with the urinary meatus displaced to the border of the glans. CONCLUSION: This high incidence raises concern about possible links between assisted reproduction and hypospadias.

Adult↗
PubMed1990

The chromosomal complements of cleaved human embryos resulting from in vitro fertilization.

Chromosome preparations were made from 25 cleaved abnormal human embryos at the two- to eight-cell stage after in vitro fertilization. Morphologically, these embryos showed either variable degrees of degeneration or an abnormal number of pronuclei before first cleavage. Among 14 successfully karyotyped embryos, only 3 had a normal chromosomal complement. Eleven showed chromosomal abnormalities, including triploidy, haploidy, and mosaicism. This finding documents a high incidence of chromosomal errors in morphologically abnormal early preimplantation embryos.

Chromosome Aberrations↗