Publications by authors named "Yüksel Onaran"

15 Publications

  • Page 1 of 1

The Effect of Coasting on Intracytoplasmic Sperm Injection Outcome in Antagonist and Agonist Cycle.

Int J Fertil Steril 2017 Apr-Jun;11(1):1-6. Epub 2016 Nov 11.

Department of Obstetrics and Gynaecology, School of Medicine, Muğla Sıtkı Koçman University, Muğla, Turkey.

Background: Coasting can reduce the ovarian hyperstimulation syndrome (OHSS) risk in ovulation induction cycles before intracytoplasmic sperm injection (ICSI). This study aimed to investigate the effect of gonadotropin-releasing hormone (GnRH) agonist and GnRH antagonist protocols to controlled ovarian hyperstimulation (COH) cycles with coasting on the parameters of ICSI cycles and the outcome.

Materials And Methods: In a retrospective cohort study, 117 ICSI cycles were per- formed and coasting was applied due to hyperresponse, between 2006 and 2011. The ICSI outcomes after coasting were then compared between the GnRH agonist group (n=91) and the GnRH antagonist group (n=26).

Results: The duration of induction and the total consumption of gonadotropins were found to be similar. Estradiol (E) levels on human chorionic gonadotropin (hCG) day were found higher in the agonist group. Coasting days were similar when the two groups were compared. The number of mature oocytes and the fertilization rates were similar in both groups; however, the number of grade 1 (G1) embryos and the number of transferred embryos were higher in the agonist group. Implantation rates were significantly higher in the antagonist group compared to the agonist group. Pregnancy rates/embryo transfer rates were higher in the antagonist group; however, this difference was not statistically significant (32.8% for agonist group vs. 39.1% for antagonist group, P>0.05).

Conclusion: The present study showed that applying GnRH-agonist and GnRH-antago- nist protocols to coasted cycles did not result in any differences in cycle parameters and clinical pregnancy rates.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5215705PMC
http://dx.doi.org/10.22074/ijfs.2016.5144DOI Listing
November 2016

Effects of the etonogestrel contraceptive implant (Implanon) on bone metabolism during lactation: a prospective study.

J Fam Plann Reprod Health Care 2017 Apr 1;43(2):113-117. Epub 2016 Dec 1.

MD Department of Obstetrics and Gynecology, Turgut Ozal University School of Medicine, Ankara, Turkey.

Aim: To evaluate the effects of the etonogestrel contraceptive implant (Implanon) on bone metabolism in lactating women using markers for bone formation and resorption.

Study Design: This single-centre, prospective cohort study was conducted in Turgut Ozal University Medical Faculty Obstetrics and Gynecology Department with healthy lactating women aged between 24 and 38 years to compare the effect on bone metabolism of 6 months' use of either the implant or a non-hormonal contraceptive method. The study group (=25) used an implant and the control group (=25) used a non-hormonal contraceptive intrauterine device inserted 40 days' postpartum. Bone metabolism differences at the time of insertion and after 6 months were assessed quantitatively by biochemical analysis of serum and urine samples.

Results: At baseline, serum levels of bone metabolism parameters were similar for the two groups. In the implant group, serum alkaline phosphatase (ALP) levels decreased (=0.004) and total protein levels increased (=0.045) at 6 months. In the control group, serum levels of bone metabolism parameters did not change at 6 months compared to baseline. However, serum levels of phosphorus (=0.013) and ALP (=0.003) decreased at 6 months compared to baseline.

Conclusion: Six months' postpartum use of Implanon was found to have no deleterious impact on bone turnover in healthy lactating women.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1136/jfprhc-2015-101375DOI Listing
April 2017

Prohepcidin in maternal circulation: is it related to spontaneous preterm labor?

Turk J Med Sci 2014 ;44(6):1108-13

Department of Obstetrics and Gynecology, Turgut Özal University, Ankara, Turkey.

Background/aim: To investigate whether spontaneous preterm labor (PTL) with intact membranes is associated with changes in maternal serum prohepcidin concentrations.

Materials And Methods: The study consisted of patients with spontaneous PTL with intact membranes (n = 25), a control group of healthy pregnant women between the 24th and 37th gestational weeks (n = 22), and uncomplicated term pregnancies in spontaneous labor (n = 19). Blood samples were collected from patients at the time of clinical diagnosis. Levels of prohepcidin, hemoglobin, serum ferritin, serum iron, unsaturated iron binding capacity, total iron binding capacity, transferrin and transferrin saturation, C reactive protein, and interleukin-6 were measured.

Results: Patients with spontaneous PTL had significantly lower maternal serum prohepcidin concentrations than term delivery and control subjects.

Conclusion: Maternal serum prohepcidin concentration is lower in patients with spontaneous PTL compared to term delivery and control subjects. This suggests that measuring maternal serum prohepcidin concentrations in PTL may be a feasible method for understanding etiologic causes of spontaneous preterm delivery, but, before suggesting this as a course of action, low levels of prohepcidin in patients with PTL need to be more fully investigated.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3906/sag-1304-94DOI Listing
January 2015

Is the level of maternal serum prohepcidin associated with preeclampsia?

Hypertens Pregnancy 2015 May 30;34(2):145-52. Epub 2014 Dec 30.

Department of Obstetrics and Gynecology, Turgut Ozal University , Ankara , Turkey .

Objective: The objective of the study was to compare pro-hepcidin, hemoglobin (Hb) concentration, hematocrit (Hct), C-reactive protein (CRP), IL-6 and iron status parameters in preeclamptic (PE) and healthy pregnant women, and to examine the relationship between serum pro-hepcidin levels and iron parameters of preeclampsia (PE).

Methods: In a prospective controlled study, we collected serum from women with normal pregnancy (n = 37) and from women with PE (n = 30) at the Department of Obstetrics and Gynecology at Turgut Ozal University between February 2010 and January 2013. Pro-hepcidin, hemoglobin (Hb) concentration, hematocrit (Hct), CRP, IL-6 and iron status parameters were measured in all patients and compared between groups.

Results: Levels of serum prohepcidin in PE and control groups were similar and amount 69.4 ± 19.7 and 71.9 ± 22.1 ng/ml, respectively. The difference was not statistically significant (p: 0.694). On the other hand, the study group had a statistically lower iron binding capacity (IBC), total iron binding capacity, transferin, total protein, albumin levels (p < 0.05). No significant differences were found among prohepcidin, Hb concentration, Hct, iron, ferritin, IL-6, urea and creatine in both the groups.

Conclusion: In pregnancies complicated by PE with normal values of hemoglobin and hematocrit, serum prohepcidin concentrations are similar to those observed in healthy pregnant women. The analysis revealed no significant correlations between prohepcidin level and serum iron, serum ferritin or transferrin in the PE.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3109/10641955.2014.988350DOI Listing
May 2015

Corneal biomechanical parameters during pregnancy.

Eur J Ophthalmol 2014 May-Jun;24(3):314-9. Epub 2013 Oct 16.

1 Ulucanlar Eye Research Hospital, Ankara - Turkey.

Purpose: To evaluate the variation in biomechanical properties and central corneal thickness (CCT) for each trimester during pregnancy and to compare the values with those in nonpregnant women.

Methods: We prospectively studied the eyes of 32 pregnant and 34 age-matched non-pregnant women. The parameters included corneal hysteresis (CH), corneal resistance factor (CRF), Goldmann-correlated intraocular pressure (IOP), and corneal-compensated IOP measured by the Ocular Response Analyzer (ORA). The CCT was also measured with an ultrasonic pachymeter attached to the ORA.

Results: The mean age was 27.0 ± 3.8 years in the study group and 28.0 ± 4.1 years in the control group. The mean CH measurement was 10.6 ± 1.4 mmHg in the study group and 10.1 ± 1.3 mmHg in the control group. The mean CRF value was 9.6 ± 1.7 mmHg in the study group and 10.0 ± 1.4 mmHg in the control group. The mean CCT value was 541.1 ± 22.4 µm in the study group and 536.5 ± 27.1 µm in the control group. No statistically significant differences were found regarding CH, CRF, or CCT values between the 2 groups (independent t test, p = 0.160, p = 0.355, p = 0.450, respectively).

Conclusions: Hormonal changes during pregnancy may not affect corneal biomechanics. This may be due to the balanced effect of the various hormones on the cornea during pregnancy.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.5301/ejo.5000378DOI Listing
October 2014

Relationship between oxidant and antioxidant activity in hyperemesis gravidarum.

J Matern Fetal Neonatal Med 2014 May 11;27(8):825-8. Epub 2013 Oct 11.

Obstetrics and Gynecology Department, Turgut Ozal University Medical School , Ankara , Turkey and.

Objective: To evaluate oxidant and antioxidant activity in patients with hyperemesis gravidarum (HG) by using serum total antioxidant activity (TAO), total free sulfhydryl (-SH), ceruloplasmin and lipid hydroperoxide (LOOH) levels.

Materials And Methods: In a cross-sectional trial, blood samples were collected from patients with HG (n = 25) and healthy pregnant women (n = 25) as control group. Serum TAO activities, -SH levels and LOOH levels and ceruloplasmin levels were measured.

Results: Serum TAO activity was found to be significantly lower (p = 0.003) in patients with HG compared with controls. However, serum -SH levels, LOOH levels and ceruloplasmin levels did not change significantly in patients with HG compared to controls.

Conclusion: Presence of oxidative stress in HG patients depends more on reduced antioxidant activities than increased oxidative stress.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3109/14767058.2013.842549DOI Listing
May 2014

Bilateral non-arteritic anterior ischemic optic neuropathy following second-trimester spontaneous abortion-related haemorrhage.

J Clin Neurosci 2012 Oct 13;19(10):1445-7. Epub 2012 Aug 13.

Department of Ophthalmology, Faculty of Medicine, Kirikkale University, Kirikkale, Turkey.

Bilateral anterior ischemic optic neuropathy is a rare complication of massive haemorrhage and related hypotension and anaemia in young individuals. We report a 34-year-old woman with bilateral non-arteritic ischemic optic neuropathy (NAION) after a massive spontaneous abortion-related haemorrhage who presented with sudden painless visual loss in her left eye. Visual acuity was 20/20 in the right eye with only hand motion discernible in the left eye. There was a left relative afferent papillary defect (RAPD). Fundus examination revealed bilateral swollen, hyperaemic optic discs and nerve fiber layer haemorrhages. Brain MRI and magnetic resonance venography were normal. The diagnosis of bilateral NAION was made and intravenous pulse corticosteroid therapy (1000 mg/day) was administered for three days. On the sixth day, optic disc oedema regressed bilaterally and on the third week, the visual acuity improved to 20/80 in the left eye. The visual field showed only a small spared area in the nasal region, and persistent RAPD was present. After two months, fundus examination showed a small and crowded optic disc on the right and a pale optic disc on the left. Severe acute haemorrhage is an important risk factor for NAION in healthy young individuals. In addition to correction of hypotension and anaemia, intravenous high dose corticosteroid might be beneficial for treatment.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jocn.2011.11.033DOI Listing
October 2012

Topical anesthetic (lidocaine-prilocaine) cream application before speculum examination in postmenopausal women.

J Minim Invasive Gynecol 2012 May-Jun;19(3):350-5. Epub 2012 Mar 13.

Department of Obstetrics and Gynecology, Fatih University Medical School, Ankara, Turkey.

Study Objective: To evaluate the effectiveness of lidocaine-prilocaine (EMLA 5%) cream application to genital mucosa for reducing pain or discomfort associated with speculum examination in postmenopausal women.

Design: A randomized controlled study (Canadian Task Force classification I).

Setting: A university hospital.

Patients: One-hundred thirty-four postmenopausal women.

Interventions: The subjects were randomized to an EMLA cream group, a lubricant gel group, or a control group. General data was collected, including age, body weight, gravidity, parity, smoking habits, history of diabetes mellitus, previous gynecologic operations, dyspareunia, sexual activity, and duration of menopause. All patients were asked to score pain at 3 time points (insertion, dilation, and extraction of speculum) during the procedure using a visual analog scale. Pain intensity during speculum examination was compared between the groups.

Measurements And Main Results: There was no statistically significant difference between the EMLA cream, the lubricant gel, and the control groups in terms of age, weight, gravidity, parity, dyspareunia, duration of menopause, sexual activity, smoking habit, diabetes mellitus, previous vaginal and other gynecological procedures, vaginal length, and serum follicle-stimulating hormone and estradiol levels (p > .05). The pain scores obtained during all phases of speculum application were significantly lower in the EMLA group than in both the lubricant gel and the control groups (p < .001). Comparing the gel and the control groups, a lower pain score was observed in the former, except for the second phase of the examination (p < .001).

Conclusion: Topical application of EMLA 5% cream on genital mucosa of postmenopausal women before vaginal examination significantly reduces pain associated with speculum application.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jmig.2012.01.005DOI Listing
September 2012

Investigation of oxidative balance in patients with dysmenorrhea by multiple serum markers.

J Turk Ger Gynecol Assoc 2012 1;13(4):233-6. Epub 2012 Dec 1.

Department of Biochemistry, Faculty of Medicine, Fatih University, Ankara, Turkey.

Objective: To investigate the level of oxidative stress in patients with dysmenorrhea by multiple serum markers including malondialdehyde (MDA), nitrotyrosine (3-NT), deoxyguanosine (8-OHdG) and superoxide dismutase (SOD).

Material And Methods: Fifty-eight women, aged between 20 and 34, who had had regular menses for at least six previous cycles, were involved. The women were divided into two groups. The study group consisted of 33 patients with primary dysmenorrhea, and the control group consisted of 25 healthy women.

Results: Demographic characteristics of patients were similar between the two groups. The serum MDA levels were 1.32±0.46 and 0.91±0.26 nmol/mL for the dysmenorrhea and control groups, respectively (p<0.001). The differences in plasma levels of 3-NT, SOD and serum 8-OhdG were similar in both groups (p>0.05). Also, no correlation was found between the severity of dysmenorrhea and the levels of oxidative markers.

Conclusion: Oxidative stress is slightly aggravated in patients with dysmenorrhea.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.5152/jtgga.2012.36DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3881713PMC
March 2014

Impact of maternal fasting during Ramadan on fetal Doppler parameters, maternal lipid levels and neonatal outcomes.

J Matern Fetal Neonatal Med 2012 Jul 16;25(7):975-7. Epub 2011 Aug 16.

Department of Obstetrics and Gynecology, Fatih University Faculty of Medicine, Ankara, Turkey.

Objective: The aim of the present study was to evaluate whether fasting may cause changes in maternal lipid profile, glucose level and ketonuria, and whether it has any adverse effects on fetal Doppler, birthweight, preterm delivery or cesarean section rate.

Methods: Fifty-six consecutive, healthy women with singleton uncomplicated pregnancies of ≥ 28 week gestation who had fasted for at least 10 consecutive days during the study period were defined as the study group. Fifty-four healthy non-fasted women matched for age, parity, and gestational age were defined as the control group. Groups were compared according to fetal middle cerebral artery and umbilical artery systolic/diastolic ratio, maternal serum lipid levels and neonatal outcomes (gestational age at delivery, birthweight, delivery type and neonatal intensive care admission).

Results: No statistical difference was found between the groups according to fetal Doppler parameters, amniotic fluid index, gestational age at delivery, cesarean section rate, birthweight or NICU admission. However, lower levels of VLDL, triglyceride and higher incidence of ketonuria were detected in the fasting group (p < 0.05).

Conclusion: Fasting of healthy women during pregnancy seems to have no adverse effects on amniotic fluid index, fetal Doppler and delivery parameters.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3109/14767058.2011.602142DOI Listing
July 2012

Cardiac flow parameters with conventional and pulsed tissue Doppler echocardiography imaging in patients with polycystic ovary syndrome.

Gynecol Endocrinol 2010 Nov;26(11):815-8

Department of Cardiology, Fatih University, Faculty of Medicine, Cankaya, Ankara, Turkey.

Background: Polycystic ovary syndrome (PCOS) is independently associated with the major cardiovascular risk factors. The aim of this study was to examine the echocardiographic profiles of patients with PCOS using conventional echocardiographic methods and tissue Doppler imaging.

Methods: For this study, we have registered 48 women with PCOS and 21 healthy control subjects who were matched with respect to age and body mass index. Standard two-dimensional and M-mode measurement, transmitral valve flows and tissue Doppler imaging of mitral and tricuspid anulus were recorded.

Results: In PCOS and control groups, left ventricular and atrium diameters, ejection fraction, mitral E/A ratio, deceleration time and isovolumic relaxation time were similar. There were no significant differences between patients with PCOS and control subjects with respect to tissue Doppler profiles.

Conclusion: Patients with PCOS execute echocardiographic measures of cardiac function that are similar to those of healthy women.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3109/09513590.2010.487596DOI Listing
November 2010

Influence of self-reported snoring and witnessed sleep apnea on gestational hypertension and fetal outcome in pregnancy.

Arch Gynecol Obstet 2011 Feb 22;283(2):195-9. Epub 2009 Dec 22.

Department of Gynecology and Obstetrics, Fatih University Faculty of Medicine, Ankara, Turkey.

Introduction: Hormonal and physical changes during pregnancy are associated with some sleep-related breathing disorders (SRBD) such as snoring and sleep apnea, and SRBD are associated with recurrent episodes of oxyhemoglobin desaturation and increased sympathic activity. We aimed to search the incidence of self-reported snoring and witnessed apnea in the third trimester of pregnancy and to analyze their influence on fetal outcome and gestational hypertension (GH).

Methods: Two hundred pregnant women (group 1) during their stay for labor and 200 age-matched control women (group 2) were included in the study. All patients were asked to complete a detailed questionnaire that covers demographic features. We measured neck circumference and performed Epworth sleepiness scale (ESS) to determine excessive daytime sleepiness in all patients.

Results: The mean age was 27.4 ± 6.7 and 26.3 ± 5.8 for group 1 and 2, respectively. Habitual snoring was detected only in group 1 in 5 patients; 36 pregnant women and 7 control patients reported occasional snoring. Both habitual and occasional snoring was significantly observed to be increased in pregnancy. Witnessed sleep apnea was been observed only in 1 patient in group 1. The mean neck circumference was 37.4 ± 3.2, 35.1 ± 2.1 cm and ESS was 6.7 ± 3.01, 5.1 ± 2.1 for group 1 and 2, respectively (p < 0.05). There was no significant correlation between snoring and GH. There was no significant relationship between all investigated parameters and fetal outcome. We found that excessive weight gain during pregnancy is significantly associated with snoring.

Conclusion: We concluded that, although pregnant women, especially who gain excessive weight during their pregnancy, significantly snore more than nonpregnant women, this did not affect fetal outcome.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00404-009-1327-2DOI Listing
February 2011

Influence of gum chewing on postoperative bowel activity after cesarean section.

Gynecol Obstet Invest 2010 21;69(2):84-7. Epub 2009 Nov 21.

Department of Obstetrics and Gynecology, Fatih University Medical School, Ankara, Turkey. hasankafali @ hotmail.com

Objective: To assess the effects of gum chewing on postoperative bowel function after cesarean section.

Material And Methods: Women who underwent cesarean section were randomized to either a gum-chewing group (n = 74) or a non-gum-chewing group (n = 76). The two groups were compared with respect to the return of bowel activity, postoperative analgesic and antiemetic drug requirement and postoperative hospital stay.

Results: Bowel sounds appeared in a significantly shorter duration of time in the study group, the mean being 5.9 h as compared to 6.7 h in the control group (p < 0.01). The first passage of flatus postoperatively was 22.4 h in the gum-chewing group and 31 h in the control group (p < 0.001). The total length of hospital stay was shorter in the gum-chewing group (2.1 days) than in the control group (2.3 days), but it was not statistically significant (p > 0.05). Postoperative analgesic requirement in both groups was similar, but the postoperative antiemetic need in the gum-chewing group was lower than in the control group (p < 0.01).

Conclusion: On the basis of the tolerability and results on bowel function, gum chewing provides a simple method for early recovery of bowel function after cesarean section.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1159/000260048DOI Listing
June 2010

Familial mediterranean fever: a diagnostic challenge in pregnancy.

J Turk Ger Gynecol Assoc 2009 1;10(4):235-7. Epub 2009 Dec 1.

Fatih University, Department of Obstetrics and Gynecology, Ankara, Turkey.

Familial Mediterranean Fever (FMF) is an autosomal recessive disease which is characterized by recurrent, self-limiting, short attacks of serositis while abdominal pain is the most common symptom. The underlying clinical and pathological picture is that of acute peritonitis. These abdominal signs are often so striking that they mimic an acute abdominal calamity suggesting several possible gastrointestinal, gynecologic or urologic diagnoses. Diagnosis of acute abdomen in pregnancy also remains one of the most challenging conditions as the physiological consequence of pregnancy and nonspecific laboratory parameters. A limited number of studies addressed FMF in pregnancy and none of them mentioned the diagnostic challenging of FMF during pregnancy because the patients had al been diagnosed previously. In this paper, we discussed a 20 year old, gravida 1, parity 0 patient whose twin pregnancy wash complicated by an acute abdominal condition after amniocentesis and the difficulties of making the diagnosis of FMF with the complications during this diagnostic period in pregnancy.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3939172PMC
March 2014