P–651 Strict embryo-endometrial synchrony does not contribute to the successful pregnancy during vitrified-warmed embryo transfer with hormone replacement cycles

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
T Takahashi ◽  
K Ota
Keyword(s):  
Embryo Transfer ◽  
Endometrial Thickness ◽  
Hormone Replacement ◽  
Time Lapse ◽  
Successful Pregnancy ◽  
Logistic Analysis ◽  
Significant Difference ◽  
The Mean ◽  
Multivariate Logistic Analysis

Abstract Study question Does strict embryo-endometrium synchronization relate to pregnancy during vitrified-warmed embryo transfer (ET) with hormone replacement (HRT) cycles? Summary answer A 12-hour delay in the embryo-endometrial synchrony was acceptable, and this delay was not an independent predictor of pregnancy during vitrified-warmed ET with HRT cycles. What is known already Embryo-endometrium synchrony is considered to be necessary for successful pregnancy in both fresh and frozen-thawed cycles. Until now, the date of ET has been determined by the synchronization of the embryo developmental stage and the endometrium on a daily basis. To date, with the advent of the time-lapse incubator, it is possible to observe the embryo development from fertilization over time and to calculate the exact time from fertilization of the transferred embryo. However, there are very few studies on the extent to which increases the accuracy of synchronization between embryo and endometrium contributes to a successful pregnancy. Study design, size, duration This retrospective cohort study included 319 consecutive cycles during vitrified-warmed ET with HRT between August 2016 and August 2018. This study was conducted in an academically affiliated private practice. Participants/materials, setting, methods We analyzed 319 vitrified-warmed single-blastocyst transfer cycles. All frozen expanded blastocysts were inseminated by intracytoplasmic sperm injection (ICSI) and cultured in a time-lapse incubator. We calculated time for the in vitro culture of the embryo after ICSI (t1) and time for progesterone-priming (t2) up to ET. The difference between t1 and t2 (delta-t) was used as an indicator of embryo-endometrium synchrony. We examined the relationship between delta-t and treatment outcomes using multivariate logistic analysis. Main results and the role of chance The mean patient’s age at oocyte retrieval was 35.7 (SD 4.3). The number of pregnant cycles was 157 in all treatment cycles (pregnancy rate, 49.2%). The mean value of delta-t was 9.9 h (SD 2.6) in all cycles. There was no significant difference of delta-t in pregnant (mean, SD: 10.0 h, 2.8 h) and non-pregnant cycles (mean, SD: 10.0 h, 2.3 h). Treatment cycles were classified according to the quartile of delta-t, and we examined the percentages of pregnant cycles in each group. There were no significant differences in pregnancy rates among the groups (p = 0.75). On multivariate logistic analysis, patient’s age (adjusted odds ratio [aOR]: 0.94, 95% confidence interval [CI]: 0.89–0.99), previous treatment cycles (aOR: 0.74, 95% CI: 0.56–0.99), endometrial thickness at ET (aOR: 1.19, 1.04–1.36), and good quality blastocysts (>3BB according to Gardner’s classification) at vitrification (aOR: 2.49, 95% CI: 1.23–5.05) were independent predictive factors for pregnancy. On the other hand, delta-t did not contribute to pregnancy (aOR: 1.00, 95% CI: 0.99–1.00). Limitations, reasons for caution We did not examine the effects of embryo-endometrium synchrony during vitrified-warmed ET in a natural cycle. Therefore, careful interpretation of the significance of embryo-endometrium synchrony during the vitrified-warmed ET should be taken. Wider implications of the findings: We showed the embryo-endometrium synchrony did not contribute to the pregnancy during vitrified-warmed ET with HRT cycles. These results cast doubt on the existence of an optimal implantation window by changing the timing of ET with the results of gene expression testing of the endometrium. Trial registration number Not applicable

scholarly journals A comparison of in vitro fertilization-embryo transfer outcome by two types of soft embryo transfer catheters

2020 ◽  
Vol 7 (3) ◽  
pp. 3678-3685
Author(s):  
Soghra Rabiei ◽  
Mahnaz Yavangi ◽  
Marzieh Farimani ◽  
Iraj Amiri ◽  
Mohamad Fallah ◽  
...  
Keyword(s):  
Clinical Trial ◽  
In Vitro Fertilization ◽  
Embryo Transfer ◽  
Vitro Fertilization ◽  
Significance Level ◽  
Significant Difference ◽  
Group A ◽  
The Mean ◽  
Group B

Introduction: One of the remaining challenges in assisted reproductive procedures, especially in vitro fertilization (IVF), is proper embryo transfer. The aim of this clinical trial was to compare IVFembryo transfer outcome by two types of soft embryo transfer catheters in Hamadan Endometrics and Endometriosis Research Center (Iran). Methods: In this clinical trial study, 100 patients who were candidates for IVF were evaluated. Patients were randomly assigned into two groups (A=50 and B=50). The IVF was identical for both groups until the embryo transfer stage. For group A, soft catheter CH3 PM TRANS SET MINI was used and in group B, KITAZATO soft catheter was used for embryo transfer. All transfers were performed by one person. Patients were recruited using checklists, demographic information, infertility history, beta-human chorionic gonadotropin (ß-hCG) serum levels at day 14 post-transfer, and pregnancy bag 28 days after transfer. The results were analyzed by SPSS software version 16 and using descriptive statistics, chi-square and t-test. The significance level was < 0.05. Results: The mean age of group A and group B was 30.12 and 29.24 years, respectively (p=0.341). The mean duration of infertility in both groups was not statistically significant, and in groups A and B were 4.89 and 4 years, respectively. Ninety % of group A experienced their first IVF experience, while in group B it was slightly lower than 86%, which was not statistically significant. The mean number of eggs obtained in group A was 9.84 and in the group B was 9.88 (p=0.962). The mean number of embryos formed in group A was 6.24 and in group B was 5.72 (p=0.405). There was no statistically significant difference between the two groups in using of Tenaculum, the quality of transmission, and the contamination of the catheter head into the blood or mucus. Conclusion: According to the findings of the present study, the use of KITAZATO catheter compared to PM TRANS SET MINI CH3 catheter for fetal transfer in IVF patients showed no significant difference in pregnancy success rate. However, patients who received the KITAZATO catheter had a slightly higher chance of pregnancy that could be clinically valuable.  

scholarly journals Frozen embryo transfer: Endometrial preparation by letrozole versus hormone replacement cycle: A randomized clinical trial

2019 ◽  
Author(s):  
Alamtaj Samsami ◽  
Leila Ghasmpour ◽  
Sara Davoodi ◽  
Shaghayegh Moradi Alamdarloo ◽  
Jamshid Rahmati ◽  
...  
Keyword(s):  
Pregnancy Rate ◽  
Embryo Transfer ◽  
Hormone Replacement ◽  
Clinical Pregnancy ◽  
Frozen Embryo Transfer ◽  
Estradiol Valerate ◽  
Normal Cycle ◽  
Endometrial Preparation ◽  
Significant Difference ◽  
The Mean

Background: The endometrial preparation with stimulating natural cycles for frozen embryo transfer (FET) have benefits like lower cost and ease of use. Objective: Comparing the clinical outcome of letrozole versus hormone replacement (HR) for endometrial preparation in women with normal menstrual cycles for FET in artificial reproduction techniques. Materials and Methods: A total of 167 participants who had frozen embryos and regular ovulatory cycles were randomly divided into two groups for endometrial preparation. One group (82 women) was stimulated with letrozole 5mg/day and the other group (85 women) was hormonally stimulated by oral estradiol valerate (2 mg three times a day). All participants were followed serially by ultrasonography. Any patient who did not reach optimal endometrial thickness was excluded from the study. Implantation, biochemical and clinical pregnancy and abortion rate were reported. Results: There was no significant difference in the mean age, duration, and primary or secondary infertility, cause of the infertility, number, and quality of transferred embryos between the groups. The mean estradiol level on the day of transfer was 643 ± 217 in the HR group and 547 ± 212 in the letrozole group (P = 0.01), which was significantly different. The clinical pregnancy rate was 38.7 in the letrozole group, higher than the HR group (25.3) but not significantly different (P=0.06). Conclusion: For endometrial preparation in women with a normal cycle, letrozole yields higher pregnancy rate although it is not significant; due to its cost, ease in use, and lower side effects, letrozole is a good choice. Key words: Letrozole, Hormone replacement, Endometrial, Preparation, Frozen, Embryo.

scholarly journals Comparative Analysis of Different Local Anesthetic Solutions Available in Market: An In Vitro and Clinical Study

2021 ◽  
Author(s):  
Eisha Imran ◽  
Faisal Moeen ◽  
Beenish Abbas ◽  
Bakhtawar Yaqoob ◽  
Mehreen Wajahat ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Local Anesthetic ◽  
Compositional Analysis ◽  
Bacterial Activity ◽  
Similar Composition ◽  
Ph Values ◽  
Significant Difference ◽  
The Mean ◽  
The Difference

Abstract Objectives The study aimed to evaluate and compare various commercially available local anesthetic solutions. Materials and Methods A total of 150 commercially available local anesthetic cartridges of similar composition (2% lidocaine with epinephrine 1:100,000) were randomly collected and divided into 3 groups. The designations of groups were selected from their product names such that each group consisted of 60 cartridges. Group S (Septodont, France) Group M (Medicaine, Korea) and Group H (HD-Caine, Pakistan). The samples were divided into five sub-groups, each consisting of 10 cartridges from each group to investigate each parameter. Results The acquired data was statistically analyzed and compared (using SPSS version 12). Compositional analysis revealed a non-significant (P>0.05) difference when the three Groups were compared with standard lidocaine and epinephrine solutions. The mean pH values of samples from group S, M and H respectively fell within the range of pH values of commercially available solutions. Non-significant difference in EPT values of Group S and H was found when efficacy was compared (p = 0.3), however a significant difference (p < 0.01) was observed in contrast to Group M. Anti-bacterial activity was observed in all the group and a non-significant difference in cell viability values of Group S and M was found (p = 0.6), while the difference was significant in comparison to Group H. Conclusion Within the limitations of these investigations, it appears that the properties of different manufacturers fall within the recommended ranges as mentioned in literature and do not appear to be statistically different in the variables we have tested.

scholarly journals AB0132 THE STUDY OF SUBCLINICAL SYNOVITIS DETECTED BY ULTRASONOGRAPHY AND MRI IN RA PATIENTS AFTER REACHING CLINICAL REMISSION ON PATIENT’S SUBJECTIVE SYMPTOMS

2021 ◽  
Vol 80 (Suppl 1) ◽  
pp. 1094.2-1094
Author(s):  
M. Nawata ◽  
K. Someya ◽  
T. Aritomi ◽  
M. Funada ◽  
K. Nakamura ◽  
...  
Keyword(s):  
Clinical Remission ◽  
Research Funding ◽  
Morning Stiffness ◽  
Univariate Analysis ◽  
P Value ◽  
Research Support ◽  
Residual Symptoms ◽  
Logistic Analysis ◽  
Significant Difference ◽  
Multivariate Logistic Analysis

Background:The goal of treatment in rheumatoid arthritis (RA) is to achieve remission. There is the patient with residual symptoms in the Japanese RA patient who achieved clinical remission. There are not many studies to examine the relation between everyday life, social activity and evaluation of disease activities using high-sensitivity image examinations (musculoskeletal ultrasound (MSKUS) and MRI).Objectives:To examine the relationship between subjective residual symptoms and imaging examinations in RA patients who have achieved clinical remission.Methods:30 RA patients who achieved SDAI remission during RA treatment. Age, sex, disease duration, physical findings, serological markers, disease activity, HAQ, EQ-5D-5L, FACIT-F, Patient Reported Outcomes (PROs), EGA and medications were evaluated. 44 joints were assessed by MSKUS with gray scale (GS) and power doppler (PD) and contrast-enhanced bilateral joint MRI scoring with OMERACT-RAMRIS scoring.Results:1. The mean SDAI of the 30 RA patients was 1.3. 2.In the analysis of the presence or absence of subjective residual symptoms that led to remission of SDAI (Table 1).Table 1.Subjective residual symptoms/presence (N=17)Subjective residual symptoms/absence (N=13)Univariate analysisp valueMultivariate logistic analysisp valueTJC0.0±0.00.3±0.50.0173HAQ0.4±0.40.05±0.10.00950.00181EQ5D-5L0.8±0.10.9±0.00.0001FACIT-F14.5±9.84.6±4.30.0233Morning stiffness (min)256.5±564.80.0±0.00.0210Pain (VAS) (mm)9.2±9.50.9±1.50.00440.0455PGA (mm)7.7±9.00.5±1.10.0013(1). In the univariate analysis, the number of tender joints, HAQ, EQ-5D-5L, FACIT-F, morning stiffness, and pain VAS were extracted with significant differences.(2). In multivariate logistic analysis, HAQ and pain VAS were extracted as independent factors with significant differences. 3.In univariate analysis of the association between HAQ and pain VAS extracted in multivariate logistic analysis and imaging examinations (MSKUS/MRI), MRI-synovitis was extracted with a significant difference in HAQ.Conclusion:1. It was suggested that Pain VAS and HAQ due to RA could be identified in patients reaching SDAI remission. 2. In patients reaching SDAI remission, Pain VAS ≤10 or HAQ ≤0.5 suggested that subjective residual symptoms may be eliminated. 3. HAQ ≤ 0.5 suggests that synovitis is less likely to be detected on MRI. 4. In patients who have reached SDAI remission, little residual inflammation was observed on US, suggesting that induction of remission is important not only to prevent joint destruction, but also to improve and maintain long-term QoL.Disclosure of Interests:MASAO NAWATA Grant/research support from: I have received research funding from Eli Lilly Japan K.K., Kazuki Someya: None declared, Takafumi Aritomi: None declared, Masashi funada: None declared, Katsumi Nakamura: None declared, SAITO KAZUYOSHI Grant/research support from: I have received research funding from Eli Lilly Japan K.K., Yoshiya Tanaka Speakers bureau: I have received speaking fees from Abbvie, Daiichi-Sankyo, Chugai, Takeda, Mitsubishi-Tanabe, Bristol-Myers, Astellas, Eisai, Janssen, Pfizer, Asahi-kasei, Eli Lilly, GlaxoSmithKline, UCB, Teijin, MSD, and Santen, Consultant of: I have received consulting fees from Abbvie, Daiichi-Sankyo, Chugai, Takeda, Mitsubishi-Tanabe, Bristol-Myers, Astellas, Eisai, Janssen, Pfizer, Asahi-kasei, Eli Lilly, GlaxoSmithKline, UCB, Teijin, MSD, and Santen, Grant/research support from: I have received research grants from Mitsubishi-Tanabe, Takeda, Chugai, Astellas, Eisai, Taisho-Toyama, Kyowa-Kirin, Abbvie, and Bristol-Myers

Surface culture of Steinernema sp. on two solid media and their pathogenicity against Galleria mellonella

2021 ◽  
Vol 95 ◽  
Author(s):  
C.I. Cortés-Martínez ◽  
A.I. Rodríguez-Hernández ◽  
M.R. López-Cuellar ◽  
N. Chavarría-Hernández
Keyword(s):  
Galleria Mellonella ◽  
Egg Yolk ◽  
Infective Juvenile ◽  
Surface Culture ◽  
Solid Media ◽  
Significant Difference ◽  
Bacterial Lawn ◽  
The Mean

Abstract The use of native entomopathogenic nematodes as biocontrol agents is a strategy to decrease the environmental impact of insecticides and achieve sustainable agriculture crops. In this study, the effect of the surface culture of Steinernema sp. JAP1 over two solid media at 23–27°C on infective juvenile (IJ) production and pathogenicity against Galleria mellonella larvae were investigated. First, the bacterial lawn on the surface of the media with egg yolk (P2) or chicken liver (Cl) were incubated in darkness at 30°C for 48 and 72 h, and 100 surface-sterilized IJs were added. Four harvests were conducted within the next 35 days and the mean accumulated production was superior on Cl (210 × 103 IJs) than on P2 (135 × 103 IJs), but the productivity decreased up to 10% when the incubation time of the bacterial lawn was of 72 h. The mean pathogenicity of in vitro- and in vivo-produced IJs were of 47–64% and 31%, respectively. It is worth noting that none of the two solid media had a statistically significant difference in IJ pathogenicity. Considering that the maximum multiplication factor of IJs on solid media was 2108 and that the pathogenicity against G. mellonella was outstanding, Steinernema sp. has a good potential for in vitro mass production.

scholarly journals The incidence rate of unresponsive thin endometrium in frozen embryo transfer cycles: A case-series of therapy with granulocyte colony stimulating factor

2019 ◽  
Author(s):  
Shokouhosadat Miralaei ◽  
Mahnaz Ashrafi ◽  
Arezoo Arabipoor ◽  
Zahra Zolfaghari ◽  
Saeideh Taghvaei
Keyword(s):  
Embryo Transfer ◽  
Endometrial Thickness ◽  
Case Series ◽  
Frozen Embryo Transfer ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Cross Sectional ◽  
Thin Endometrium ◽  
Stimulating Factor

Background: Treatment-resistant thin endometrium (TTE) during in-vitro fertilization is a relatively uncommon and challenging problem. Objective: The primary aim of the study was to assess the TTE rate during frozen embryo transfer (FET) cycles and the secondary aim was to evaluate the effect of intrauterine instillation of granulocyte colony stimulating factor (G-CSF) in these cases. Materials and Methods: In this cross-sectional study, all of the women who underwent FET cycles with hormonal endometrial preparation in Royan Institute from June 2015 to March 2018 were evaluated and all of the cases with TTE diagnosis (endometrial thickness < 7 mm after using high doses of estradiol) were included. In the eligible cases, 300 μgr of G-CSF was infused intrauterine. If the endometrium had not reached at least a 7-mm, a second infusion was prescribed within 48 hr later. Results: During the study, 8,363 of FET cycles were evaluated and a total of 30 infertile patients (0.35%) with TTE diagnosis were detected. Finally, 20 eligible patients were included. The changes of endometrial thickness after G-CSF therapy were significant (p< 0.001); however, the endometrial thickness did not reach 7 mm in nine patients (45%) and the embryo transfer was canceled. Conclusion: It was found that the rate of TTE during the FET cycle is very low and intrauterine perfusion of G-CSF has a potential effect to increase the endometrial thickness in these patients; however, the rate of cancellation was still high and poor pregnancy outcomes were observed. Key words: Granulocyte colony-stimulating factor, Cryopreservation, Embryo transfer, Endometrial diseases.

scholarly journals Comparative Study Between Mock Embryo Transfer Prior To The Treatment Cycle and Real Embryo Transfer In In Vitro Fertilization

KnE Medicine ◽  
2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Hilma Putri Lubis
Keyword(s):  
In Vitro Fertilization ◽  
Embryo Transfer ◽  
Treatment Cycle ◽  
Uterine Cavity ◽  
Pregnancy Rates ◽  
Clinical Pregnancy ◽  
Vitro Fertilization ◽  
Significant Difference ◽  
Clinical Pregnancy Rates

<p><strong>Introduction</strong><strong></strong></p><p>A trial or mock embryo transfer (ET) may influence pregnancy rates and it performed prior to ET allows the clinician to assess the uterine cavity and the utero-cervical angle. The aim of this study is to compare the consistency of the type of ET in mock ET with real ET.</p><p><strong>Material &amp; Methods</strong></p><p>A retrospective comparative analysis of  patients who underwent in vitro fertilization or ICSI cycle from January 2014 to December 2014 in Halim Fertility Center was done. The type of transfer was divided into two groups: ‘easy’ or ‘difficult’. An easy ET was defined as a transfer that occurred without the use of manipulation or other instrumentation and difficult ET was considered when additional instrumentation was required.</p><p><strong>Results</strong></p><p>From the study, 103 patients who underwent Mock-ET, we  found 58 patients (56.3%) with easy ET and 45 patients (43.7%) with difficult ET, which with hard catheter ET in 17 patients (16.5%), with osfander assistance in 20 patients (19.4%) and with stylet in 8 patients (7,8%). 58 patients with Easy Mock ET group were entirely easy real ET (100%) and 45 patients with difficult Mock ET group also entirely were difficult real ET (100%). The Statistical analysis shows no significant difference between the mock ET and real ET groups (p&gt;0,05). In easy real ET, clinical pregnancy rates were 32.8% and in difficult real ET, clinical pregnancy rates were 26.7% with no significant difference between the  groups (p&gt;0,05).</p><p><strong>Conclusion:</strong></p><p>Mock ET prior to the treatment cycle is consistent with real ET.</p>

Successful pregnancy and delivery after in vitro fertilization and embryo transfer in a patient with primary hypopituitarism

2000 ◽  
Vol 73 (5) ◽  
pp. 1057-1058 ◽  
Author(s):  
Nobuhiko Suganuma ◽  
Madoka Furuhashi ◽  
Tomoko Ando ◽  
Yoshimasa Asada ◽  
Osamu Mori ◽  
...  
Keyword(s):  
In Vitro Fertilization ◽  
Embryo Transfer ◽  
Successful Pregnancy ◽  
Vitro Fertilization ◽  
Pregnancy And Delivery

P–411 Does subcutaneous progesterone (SC-P) administration eliminate the necessity of serum progesterone level monitoring in frozen embryo transfer (FET) cycles?

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
F K Boynukalin ◽  
R Abalı ◽  
M Gultomruk ◽  
B Demir ◽  
Z Yarkiner ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Clinical Outcomes ◽  
Embryo Transfer ◽  
Endometrial Thickness ◽  
Hormone Replacement ◽  
Pregnancy Rates ◽  
Ongoing Pregnancy ◽  
Ongoing Pregnancy Rate ◽  
Serum Progesterone ◽  
Female Age

Abstract Study question Does SC-P provide similar ongoing pregnancy rates (OPRs) as intramuscular progesterone(IM-P) in hormone replacement therapy (HRT)-FET cycles and do serum progesterone (P) levels on FET day effect on pregnancy outcome? Summary answer: SC-P administration had similar OPR compared to IM-P in HRT-FET cycles. In SC-P group embryo transfer(ET) day P found to be insignificant factor for outcome. What is known already Different P routes can be used in HRT-FET cycles such as vaginal P, IM-P and recently SC-P. Only retrospective studies evaluated the comparison of SC-P with other routes in HRT-FET cycles. Here, we assessed prospectively whether SC-P is effective for HRT-FET cycles. Previous studies reported that serum P levels on ET day after vaginal P administration clinical outcomes were closely correlated. The correlation between serum P after IM-P administration and clinical outcomes were conflicting. In addition, there is lack of data on the serum P levels after SC-P administration. Serum P levels on ET day were evaluated in this study. Study design, size, duration This prospective cohort study was performed between July 1-October 31 2020, enrolled 224 patients scheduled for HRT-FET cycles with SC-P(25 mg twice daily) or IM-P(50 mg once daily). The route of P was decided according to the patient’s eligibility to hospital. First FET cycle was included after freeze-all cycles for each patients. Female age&gt;35, PGT-A cycles, cleavage ET, &gt;1 ET, patients with uterine pathology and hydrosalpinx, FET with surplus embryos, endometrial thickness&lt;7mm were excluded. Participants/materials, setting, methods Female age ≤ 35 years old with a triple-layer endometrium &gt;7 mm underwent transfer of single blastocysts after the first ET after freeze-all cycles. The indications for freeze-all were ovarian hyperstimuation syndrome and trigger day P level&gt;1.5 ng/ml. 224 patients were eligible for study; 133 in SC-P group and 91 in IM-P group.The primary endpoint was the ongoing pregnancy rate (OPR) beyond pregnancy week 12. Main results and the role of chance The demographic, cycle, embryologic characteristics were similar between groups. The median circulating P levels on the day of ET were 19.92(15.195–27.255)ng/&#x2028;ml and 21(16.48–28)ng/ml in the SC-P and IM-P groups,(p = 0.786). The clinical pregnancy rates [86/133(64.7%) vs 57/91(62.6%);p=0.757], miscarriage rates [21/86(24.4%) vs 10/57(17.5%) ;p=0.329], and OPR [65/133 (48.9%) vs 47/91(51.6%); p = 0.683] were comparable between the SC-P and IM-P. Binary logistic regression was performed for ongoing pregnancy as the dependent factor blastocyst morphology was found to be the only significant independent prognostic factor (p = 0.006), whereas the route of P was insignificant. In the SC-P and IM-P &#x2028;groups, the effect of ET day P levels were divided into quartiles(Q) to evaluate the effect on ongoing pregnancy. In SC-P group OPR were similar in four Q [Q1:33.3%(11/33),Q2:50%(17/34),Q3:60.6%(20/33),Q4:51.5%(17/33) (p = 0.1)].For IM-P group; Q1 had a significantly reduced OPR than Q2, Q3, Q4. [26.1%(6/23),65.2%(15/23),54.5%(12/22) and 60.9%(14/23), p = 0.031]. Logistic regression analysis for OP was performed separately in SC-P group and IM-P group. Although in SC-P group, ET day P levels was not found to be a significant factor, in IM-P ET day P level was found to be an independent factor for OP in IM-P group (Q1vs Q2+Q3+Q4; OR: 8,178 95% CI: [1.387–48.223] p:0.02). . Limitations, reasons for caution Although this study has the advantage of being prospective and in a homogenous study population, randomized controlled trials are warranted to evaluate the effectiveness of SC-P to other routes of P. Extrapolation to unselected populations of this study is needed. Wider implications of the findings: Assignment of threshold of serum P on the day of ET for HRT-FET cycles to optimize outcomes is critical for every route of P. Regarding these results, individual luteal phase for HRT-FET cycles can improve IVF outcome. Trial registration number None

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