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Dive into the research topics where E.N. Tavmergen Goker is active.

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Featured researches published by E.N. Tavmergen Goker.


Archives of Gynecology and Obstetrics | 2002

Relationship of follicle number, serum estradiol level, and other factors to clinical pregnancy rate in gonadotropin-induced intrauterine insemination cycles

Hasan Tayfun Özçakir; E.N. Tavmergen Goker; Mustafa Cosan Terek; Saban Adakan; Murat Ulukus; Rafael Levi; Erol Tavmergen

Abstract  Objective:To determine the characteristics associated with clinical pregnancy rate after gonadotropin-induced intrauterine insemination cycles in patients without male or tubal factor infertility. Materials and methods:One hundred and eighty patients undergoing controlled ovarian hyperstimulation followed by intrauterine insemination were included in the study retrospectively. The patients’ files were retrospectively evaluated with respect to age, number of follicles, endometrial thickness and serum hormone levels at baseline and at the day of human chorionic gonadotropin (hCG) administration. The patients with male or unilateral tubal factor infertility were excluded from the study. Results:The serum estradiol level at the day of hCG administration was not correlated with the clinical pregnancy rate (r=–0.05, p=0.481). The number of follicles was not correlated with the clinical pregnancy rate (r=–0.09, p=0.209). There was no significant difference between the clinically pregnants (n=32) and not pregnants (n=148) regarding the mean age, baseline serum levels of luteinizing hormone (LH) and estradiol, serum estradiol and LH levels at the day of hCG administration and endometrial thickness (p>0.05). Although not statistically significant, a pregnancy rate of 14.2% with less than 3 follicles ≥18 mm is present compared to a pregnancy rate of 27.5% with at least 3 follicles ≥18 mm and 24% with ≥4 follicles ≥18 mm. Conclusion: The clinical pregnancy rate does not seem to be affected with the number of follicles present at the time of intrauterine insemination or the serum estradiol level at the day of hCG administration in a controlled ovarian hyperstimulation cycle in non-andrologic and non-peritubal factor infertility; however, there is a clear trend towards higher pregnancy rates with higher number of follicles.


Archives of Gynecology and Obstetrics | 2002

Comparison of short and long ovulation induction protocols used in ART applications according to the ovarian response and outcome of pregnancy.

Erol Tavmergen; E.N. Tavmergen Goker; Fatih Sendag; H. Sendag; Rafael Levi

Abstract This retrospective study was designed to determine whether there is any difference between short and long protocol ovulation induction with Gonadotropin Releasing Hormone agonist (GnRHa) and gonadotropins used in Assisted Reproductive Technology (ART) applications according to the number of retrieved oocytes, oocyte maturity, fertilization rates, embryo quality and the outcome of pregnancies. 240 cycles consisting of in vitro fertilization (IVF) cycles without andrologic factor and intracytoplasmic sperm injection (ICSI) cycles were evaluated. 112 cycles which were induced by short protocol GnRHa and Follicle Stimulating Hormone (FSH) + Human Menopausal Gonadotropin (HMG) combinations and 128 cycles which were induced by long protocol GnRHa and FSH + HMG combinations were compared according to the number of retrieved oocytes, cancellation rate of cycles, oocyte maturity, fertilization rates, embryo quality and pregnancy rates. The cancellation rate for short protocol cycles were found to be significantly higher than those with long protocol. The number of retrieved oocytes, mature oocytes and fertilized oocytes were also found significantly lower. The quality of embryos did not show any significant difference between these groups. The clinical pregnancy rates were evidently found to be high in the long protocol cycles. As a conclusion we have found that while the number of retrieved oocytes, mature oocytes, fertilized oocytes and clinical pregnancy rates were increasing, the cancellation rate of cycles were decreasing significantly in ART cycles induced by long protocol.


Archives of Gynecology and Obstetrics | 2002

Controlled ovarian hyperstimulation and intrauterine insemination for infertility associated with endometriosis: a retrospective analysis

E.N. Tavmergen Goker; Hasan Tayfun Özçakir; Mustafa Cosan Terek; Rafael Levi; Saban Adakan; Erol Tavmergen

Abstract Objective To evaluate the efficacy of controlled ovarian hyperstimulation and intrauterine insemination for infertility associated with endometriosis. Material and methods A retrospective analysis of 260 patients with the only diagnosis of endometriosis, or male factor, or tubal factor, or unexplained infertility were performed: a total of 56 patients with different stages of endometriosis, a control group consisting of 38 patients with male factor infertility, a group of 26 patients with tubal factor infertility and a group of 140 patients with others (unexplained infertility, ovulation disorders, cervical factor). Pregnancy rate, hormone levels, endometrial thickness and number of follicles were analyzed. Results Clinical pregnancy rates per patient were similar between endometriosis, male factor, tubal factor, and others including unexplained infertility, ovulation disorders and cervical factor groups (10.7%, 5.4%, 11.5%, 17.9%, respectively; p>0.05). Clinical pregnancy rates per patient were not effected between the 2 subgroups of endometriosis as minimal to mild and moderate to severe [5.1% (2/39) versus 23.5% (4/17), p=0.19]. Conclusion Endometriosis did not affect the clinical pregnancy rate per patient compared to the other infertility factors. Endometriosis of various stages have no effect on the success of controlled ovarian hyperstimulation combined with intrauterine insemination.


Fertility and Sterility | 2013

Comparison of montelukast and cabergoline for prevention of ovarian hyperstimulation syndrome (OHSS): in an experimental rat model

Levent Akman; G. Sahin; O. Erbas; Huseyin Aktug; A. Akdogan; E.N. Tavmergen Goker


Fertility and Sterility | 2013

Follicular fluid and embryo cell culture media total antioxidant capacity and oxidative stress, their role in fertilization and embro selection in IVF cycles

S. Seyfettinoglu; Erol Tavmergen; A. Akdogan; G. Sahin; Y. Akcay; E.N. Tavmergen Goker


Fertility and Sterility | 2013

Which is better; day 2 or day 3 embryo transfer in antagonist cycles?

G. Sahin; A. Akdogan; N. Calimlioglu; T. Dogu; E.N. Tavmergen Goker; Erol Tavmergen


Fertility and Sterility | 2012

Do multinucleated embryos in IVF cycles affect IVF outcome

G. Sahin; A. Akdogan; N. Calimlioglu; Ayşen Durmaz; E.N. Tavmergen Goker; Erol Tavmergen


Fertility and Sterility | 2008

Is myomectomy essential before ART

A. Akdogan; G. Sahin; C. Barut; Rafael Levi; E.N. Tavmergen Goker; Erol Tavmergen


Fertility and Sterility | 2008

Does early follicular serum prolactin levels effect IVF cycle outcomes

G. Sahin; A. Akdogan; C.Y. Sanhal; Rafael Levi; Erol Tavmergen; E.N. Tavmergen Goker


Fertility and Sterility | 2008

Does general anesthesia effect IVF outcomes

C. Barut; A. Akdogan; G. Sahin; Semra Karaman; E.N. Tavmergen Goker; Erol Tavmergen

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