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Dive into the research topics where Hakan Kalaycı is active.

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Featured researches published by Hakan Kalaycı.


Journal of Obstetrics and Gynaecology Research | 2015

Transvaginal ultrasound-guided local methotrexate administration as the first-line treatment for cesarean scar pregnancy: Follow-up of 18 cases

Tayfun Cok; Hakan Kalaycı; Halis Özdemir; Bulent Haydardedeoglu; Ayse Parlakgumus; Ebru Tarim

Cesarean scar pregnancy (CSP) is a rare type of ectopic pregnancy, which occurs in previous cesarean section scar tissue, with an incidence of 1 in 1800–3000 pregnancies. Transvaginal ultrasound‐guided local methotrexate (MTX) administration presents as a non‐systemic option with possible better penetration to the pregnancy site. We present the management of 18 patients with CSP solely by transvaginal ultrasound‐guided local MTX administration. All patients were treated with local MTX with a dose of 50 mg/m2. Eleven (61.1%) of the patients did not need any further intervention. Four patients (22.2%) were treated with additional single‐dose systemic MTX due to inadequate alteration in blood β‐human chorionic gonadotrophin levels. Three patients (16.7%) required hysteroscopy and/or laparotomy. We suggest that transvaginal ultrasound‐guided local MTX treatment may be considered as a first‐line treatment for CSP.


Journal of Maternal-fetal & Neonatal Medicine | 2014

First trimester maternal lipid levels and serum markers of small- and large-for-gestational age infants

Huriye Ayse Parlakgumus; Pinar Caglar Aytac; Hakan Kalaycı; Ebru Tarim

Abstract Objective: To investigate if first trimester lipids, sonographic parameters and serum markers are related to small- and large-for-gestational age (SGA, LGA) infants. Methods: This study was conducted at Baskent University Adana Research Center between December 2009 and July 2011 and enrolled 433 women. Blood samples were drawn to measure fasting blood glucose, serum triglycerides, cholesterol, very low-density lipoprotein, low-density lipoprotein, high-density lipoprotein, fβ-hCG and pregnancy associated protein-A (PAPP-A) at the first trimester. Crown rump length and nuchal translucency were measured as suggested by the fetal medicine foundation. Results: LGA group was significantly taller (p = 0.016) and SGA group had significantly greater BMI (0.025). SGA fetuses were born at a significantly earlier gestational age (p = 0.001). Univariate analysis revealed that LGA group had significantly lower cholesterol (p = 0.038) and LDL levels (p = 0.041). PAPP-A was significantly lower in SGA Group compared with LGA Group (0.027). After controlling for age, parity, height, pre-pregnant BMI, weight gain during pregnancy and fasting blood sugar, none of the lipids, serum markers or sonographic parameters was related to LGA. PAPP-A was the only parameter significantly associated with SGA after multivariate analysis (p = 0.008). Conclusion: PAPP-A was significantly associated with SGA after controlling for confounders.


European Journal of Obstetrics & Gynecology and Reproductive Biology | 2013

Repeated ovariopexy failure in recurrent adnexal torsion: combined approach and review of the literature

Erhan Simsek; Esra Bulgan Kilicdag; Hakan Kalaycı; Seda Yuksel Simsek; Ayse Parlakgumus

Adnexal torsion is a well-known but poorly recognized gynecological emergency. Most cases are in the reproductive age group and many are related to ovarian and paraovarian masses. Adnexal torsion can also occur, however, in normal-looking ovaries with elongated utero-ovarian ligaments. The authors describe the case of a young woman presenting with a sixth recurrence of right adnexal torsion with polycystic ovaries. She had had two failed ovarian fixation efforts in the third and fifth laparoscopies. A combined ovarian fixation method is described, fixing the ovary to the pelvic side wall and shortening the utero-ovarian ligament, at elective surgery one month after the detorsion operation. Ovarian fixation after adnexal torsion is not standardized and best method of fixation remains unresolved.


Birth Defects Research Part A-clinical and Molecular Teratology | 2012

Fetal axillary cystic hygroma: A novel association with triple X syndrome

Cantekin Iskender; Ebru Tarim; Tayfun Cok; Cem Yalcinkaya; Hakan Kalaycı; Feride Iffet Sahin

BACKGROUND Triple X syndrome is a relatively common sex chromosomal aneuploidy with an estimated incidence of one in every 1000 female births. There is considerable diversity in phenotypes among patients with triple X syndrome. Triple X syndrome has been shown to have associated abnormalities, with genitourinary malformations being the most consistent. Cystic hygroma (CH) is a lymphatic malformation that occurs because of the lack of development of communication between the lymphatic and the venous systems. CH has an incidence of 1 in every 6000-10,000 live births. CH is associated with a variety of conditions, including chromosomal aneuploidies and fetal malformations. CASE We report a case of prenatally detected triple X syndrome with axillary CH as an isolated finding. The patient was referred because of a fetal cystic mass at the right axillary region. Amniocentesis revealed 47,XXX karyotype, and no additional abnormalities were detected prenatally or after abortion. CONCLUSION This is a novel description of axillary CH associated with triple X syndrome.


Journal of Obstetrics and Gynaecology Research | 2013

Obstetrical complications associated with first‐trimester screening markers in twin pregnancies

Cantekin Iskender; Ebru Tarim; Tayfun Cok; Cem Yalcinkaya; Hakan Kalaycı; Filiz Bilgin Yanık

The aim of this retrospective study was to investigate the relation between perinatal complications in twin pregnancies and the combination of first‐trimester maternal serum pregnancy‐associated plasma protein‐A (PAPP‐A) and free beta‐human chorionic gonadotrophin (β‐hCG) levels.


Journal of Maternal-fetal & Neonatal Medicine | 2017

Is primiparity a risk factor for advanced maternal age pregnancies

Hakan Kalaycı; Halis Özdemir; Didem Alkaş; Tayfun Cok; Ebru Tarim

Abstract Objective: Currently, more women are delaying childbearing until their 40s.This study compared the pregnancy and maternal features, pregnancy and foetal outcomes between multiparous and primiparous patients. We compared the same factors between assisted reproductive technology (ART) and non-ART primiparous patients because of the high proportion of ART used in the primiparous patients. Methods: The study retrospectively examined 1680 patients, 35 years of age and older, between March 2008 and February 2015. Results: Comparing the features of these two groups, there was an increased incidence of employment and the use of ART in primiparous patients, while birthweight tended to be higher in the multiparous group. There were no significant differences in pregnancy complications other than hypertension disorders, such as pre-eclampsia and HELLP syndrome, which were significantly more frequent in primiparous patients. The rates of foetal growth retardation and perinatal death were significantly higher in primiparous women. Comparison of the data between ART and non-ART primiparous patients indicated that the ART group had a higher initial body mass index and a lower smoking rate. No significant differences in pregnancy complications or foetal outcome were observed between these two groups. Conclusion: Primiparity is associated with increased pregnancy and foetal complications in advanced age pregnancies. However, the use of ART in this age group does not seem to be an additional risk factor.


Journal of Turkish Society of Obstetric and Gynecology | 2015

The effect of preserving prepared sperm samples at room temperature or at 37 °C before intrauterine insemination (IUI) on clinical pregnancy rate

Tayfun Cok; Pinar Caglar Aytac; Erhan Şimşek; Bulent Haydardedeoglu; Hakan Kalaycı; Halis Özdemir; Esra Bulgan Kilicdag

Objective: The comparison of the effect of preserving prepared sperm samples at room temperature or at 37 °C before intrauterine insemination (IUI) on clinical pregnancy rate. Materials and Methods: Retrospective clinical research. University hospital, infertility clinic. Patients with one or two follicles, between the ages of 20 and 40, whose infertility period was less than 6 years and the injected total motile sperm count was more than 10 million. Preserving sperm samples prepared for IUI at 37 ºC or at room temperature before IUI. The clinical pregnancy rate of IUI cycles between 1st of January 2004 and 1st of December 2011 in which prepared sperm samples were preserved at 37 ºC and the clinical pregnancy rate of IUI cycles between 1st of December 2011 and 31st of May 2014 in which prepared sperm samples preserved at room temperature. Results: Clinical pregnancy rates were similar in IUI cycles in which prepared sperm samples were preserved at 37 ºC and at room temperature (9.3% vs. 8.9%). Clinical pregnancy rates in IUI cycles with 2 follicles were higher than IUI cycles with 1 follicle (10.8% vs. 7.6%) (p=0.002). Further statistical analysis after splitting data according to the number of the follicles revealed that there was no statistical difference between clinical pregnancy rates after IUI cycles in which prepared sperm samples were preserved at 37 ºC or at room temperature in both one follicle (7.6% vs. 7.6%), and two follicle cycles (11.5% vs. 10.1%). Conclusions: Preserving prepared sperm samples at room temperature had no negative effect on clinical pregnancy rates when compared with reserving prepared sperm samples at 37 ºC during IUI cycles.


Journal of Obstetrics and Gynaecology Research | 2018

The nomogram of prenasal thickness and nasal bone ratio and its relationship with nuchal fold in second‐trimester fetal ultrasound

Halis Özdemir; Hakan Kalaycı; Selçuk Yetkinel; Tayfun Cok; Gonca Çoban; Ebru Tarim

We aimed to define the normal values of second‐trimester fetal prenasal thickness and nasal bone length ratio (PNT/NBL) in a low‐risk Turkish population and investigate the relationship between the increased PNT and nuchal fold (NF).


Journal of Obstetrics and Gynaecology | 2018

Is the presence of corpus callosum predictable in the first trimester

Hakan Kalaycı; Ebru Tarim; Halis Özdemir; Tayfun Cok; Ayse Parlakgumus

Abstract Corpus callosum agenesis (CCA) is a clinical condition accompanied by various aneuploidy and genetic syndromes. We identified the development of the corpus callosum (CC) in 278 patients before 18 weeks of gestational age by visualising the pericallosal artery (PCA) in the callosal sulcus and changes in the lengths and ratios of the midbrain (MB) and falx (F), which suggested elevation of the third ventricle and thalamus due to CCA in the first trimester. We succeeded in visualising the path of the PCA in 273 patients. As expected, we observed an increase in the lengths of the MB and F throughout the pregnancies. The MB:F ratio was 0.5–0.6, and it was independent of gestational age. In all 278 patients, the MB:F ratio was <0.6 (95th percentile = 0.79). We observed the presence of the CC during anatomical screening at gestational weeks 18–24. Visualisation of the PCA path (98% sensitivity) and calculation of the MB:F ratio <95th percentile (0.79–100% sensitivity) had very high sensitivity that indirectly confirmed the presence of the CC in the first trimester of pregnancy. Impact statement What is already known on this subject: After reading the articles for detecting the absence of corpus callosum (CC) at first trimester with midbrain (MB) and falx (F) measurement by Lachmann et al. (2013) and visualising pericallosal artery (PCA) as an indirect sign of CC agenesis by Pati et al. (2012), we aimed to have a look for our records visualising PCA in callosal sulcus and measure MB–F, as well as their ratios for an indirect sign of ‘presence’ of CC at first trimester. What the results of this study add: In recent literature, it is not possible to find many articles suggesting the presence of CC between 11 and 13 weeks of gestation. Díaz-Guerrero et al. (2013) and Pati et al. (2012) has researched visualising PCA path. Lachmann et al. (2013) reported an article for MB and F measurements in early suspicion of CC agenesis. Our study will be the first article in visualising PCA path and measuring MB–F lengths as well as their ratios for ‘presence’ of CC with high sensitivity rates (98% and 100%). What are the implications of these findings for clinical practice and/or further research: This study encourages clinicians visualising PCA path and measure MB–F lengths when they will try to visualise repetitive times and see how it is an easy procedure when you get used to it.


Journal of Maternal-fetal & Neonatal Medicine | 2018

Reference values of the ductus venosus pulsatility index for pregnant women between 11 and 13+6 weeks of gestation

Hakan Kalaycı; Şafak Yilmaz Baran; Gülşen Doğan Durdağ; Selçuk Yetkinel; Songül Alemdaroğlu; Serdinç Özdoğan; Seda Yüksel Şimşek; Esra Bulgan Kilicdag

Abstract Purpose: The ductus venosus pulsatility index velocity (DV PIV) has become a popular ultrasonographic measurement during the first trimester of pregnancy. The value of the DV PIV has been the topic of ongoing discussion in the literature, and its reference value in the normal population has not yet been established. Therefore, we aimed to determine a reference value for the DV PIV. Materials and Methods: We retrospectively evaluated our records of first-trimester ultrasonography performed between 2016 and 2017. Our inclusion criteria were as follows: singleton pregnancy; crown-rump length (CRL) between 45 and 84 mm; absence of structural abnormalities on the ultrasound examination; and absence of chromosomal abnormalities. Records of 820 patients were evaluated. According to the inclusion criteria, records of 458 patients were included in this study. All ultrasound examinations were performed by a single operator with the Voluson E8 (5- to 8-MHz 3 D transducer; General Electric Healthcare, Little Chalfont, UK) via the transabdominal route. Gestational weeks were designated according to CRL measurements at the beginning of the examination. Nuchal translucency (NT), nasal bone visualization (NB), tricuspid valve regurgitation (TR), “a”-wave pattern, DV PIV, S-wave (peak systolic velocity), D-wave (peak diastolic velocity), a-wave (atrial contraction in late diastole), and time-averaged maximum velocity (TAMXV) measurements were performed. To evaluate the DV Doppler images, a mid-sagittal view of the fetal profile was obtained. Color Doppler and pulse Doppler gate were used in the distal portion of the umbilical sinus, and at least three typical DV waveforms were detected. The SPSS 21.0 statistical program (IBM, Armonk, NY) was used to analyze variables. Results: The mean age, body mass index, CRL, gestational age, and NT values were 30.3 years (range, 18–45), 23.9 kg/m2 (range, 15.5–46.6), 59.5 mm (range, 45–79), 12.3 weeks (range, 11.2–13.6), and 1.58 mm (range, 0.73–2.62), respectively. The median gravidity and parity were 2 (1–8) and 0 (0–4), respectively. The “a”-wave pattern was identified in all cases, but TR was not detected in any of the cases. Measurements of DV PIV with a Gaussian distribution were suitable according to the Shapiro–Wilk test (p = .252). The mean DV PIV was 0.98, and the fifth and 95th percentiles were 0.73 and 1.22 (±2 SD), respectively. A statistical analysis of our cohort revealed that DV PIV values less than 0.73 and more than 1.22 were beyond the normal range. The mean S-wave, D-wave, a-wave, and TAMXV values were 31.18, 25.64, 8.68, and 22.72 cm/s, respectively. Conclusions: The value of DV PIV measurements is debated in the literature. Using our cohort, we defined the means and ranges of DV PIV. Determining the normal ranges of DV PIV could be helpful to anticipate congenital or chromosomal abnormalities. Further studies are needed to demonstrate the clinical importance of DV PIV, especially for patients with abnormal DV PIV measurements.

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