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Original Article04-30-2025
An assessment of total antioxidant and oxidant parameters and their correlation with embryo quality in in-vitro fertilization patients
Revista Brasileira de Ginecologia e Obstetrícia. 2025;47:e-rbgo22
Abstract
Original ArticleAn assessment of total antioxidant and oxidant parameters and their correlation with embryo quality in in-vitro fertilization patients
Revista Brasileira de Ginecologia e Obstetrícia. 2025;47:e-rbgo22
Views178Abstract
Objective:
In vitro, fertilization is the primary treatment method for infertility. Follicular fluid analysis is an approach used to optimize the results of assisted reproductive techniques. Oxidative stress represents the imbalance between the production of reactive oxygen species and their detoxification. Total Antioxidant and Oxidant Status, and Oxidative Stress Index levels are the main oxidative stress markers. This study investigated the effects of oxidative stress markers on infertility etiology, embryo quality, and success of In vitro fertilization.
Methods:
Before enrolling in the ICSI-ET cycle, participants had their FSH and LH levels assessed on the second day of the cycle. The ovarian degrees of the participants were evaluated by transvaginal ultrasonography. Participants underwent controlled ovarian stimulation using the GnRH antagonist protocol. TV-USG and serial E2 measurements were performed at appropriate intervals to follow follicular development. Follicle sizes, quantity, and endometrial thickness were recorded. Total Antioxidant and Oxidant Status, and Oxidative analyses were conducted using Rel Assay Diagnostics Assay Kits.
Results:
The average number of total oocytes in the participants was 10.25±6.66, and the average of mature M2 stage oocytes was 6.71±3.72. The average number of fertilized oocytes was 4.65±2.81. Fertilization rates were calculated as approximately 54.75±25.58%. A statistically significant positive correlation was found between embryo quality and serum Total Antioxidant Status levels (p=0.004). Similarly, a significant positive correlation was observed between embryo quality and follicular Total Antioxidant Status values (r = 0.42, p = 0.01).
Conclusion:
This study concluded that oxidative stress markers affect certain stages of the IVF treatment process.
Key-words AntioxidantsFertilization in vitroFollicular fluidInfertilityOocytesOxidantsOxidative stressSee moreViews178
Abstract
Original ArticleAn assessment of total antioxidant and oxidant parameters and their correlation with embryo quality in in-vitro fertilization patients
Revista Brasileira de Ginecologia e Obstetrícia. 2025;47:e-rbgo22
Views178Abstract
Objective:
In vitro, fertilization is the primary treatment method for infertility. Follicular fluid analysis is an approach used to optimize the results of assisted reproductive techniques. Oxidative stress represents the imbalance between the production of reactive oxygen species and their detoxification. Total Antioxidant and Oxidant Status, and Oxidative Stress Index levels are the main oxidative stress markers. This study investigated the effects of oxidative stress markers on infertility etiology, embryo quality, and success of In vitro fertilization.
Methods:
Before enrolling in the ICSI-ET cycle, participants had their FSH and LH levels assessed on the second day of the cycle. The ovarian degrees of the participants were evaluated by transvaginal ultrasonography. Participants underwent controlled ovarian stimulation using the GnRH antagonist protocol. TV-USG and serial E2 measurements were performed at appropriate intervals to follow follicular development. Follicle sizes, quantity, and endometrial thickness were recorded. Total Antioxidant and Oxidant Status, and Oxidative analyses were conducted using Rel Assay Diagnostics Assay Kits.
Results:
The average number of total oocytes in the participants was 10.25±6.66, and the average of mature M2 stage oocytes was 6.71±3.72. The average number of fertilized oocytes was 4.65±2.81. Fertilization rates were calculated as approximately 54.75±25.58%. A statistically significant positive correlation was found between embryo quality and serum Total Antioxidant Status levels (p=0.004). Similarly, a significant positive correlation was observed between embryo quality and follicular Total Antioxidant Status values (r = 0.42, p = 0.01).
Conclusion:
This study concluded that oxidative stress markers affect certain stages of the IVF treatment process.
Key-words AntioxidantsFertilization in vitroFollicular fluidInfertilityOocytesOxidantsOxidative stressSee more
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Original Article04-08-2022
Estimate of Dietary Total Antioxidant Capacity of Pregnant Women and Associated Factors Estimativa da capacidade antioxidante total da dieta de gestantes e fatores associados
Revista Brasileira de Ginecologia e Obstetrícia. 2022;44(2):91-99
Abstract
Original ArticleEstimate of Dietary Total Antioxidant Capacity of Pregnant Women and Associated Factors Estimativa da capacidade antioxidante total da dieta de gestantes e fatores associados
Revista Brasileira de Ginecologia e Obstetrícia. 2022;44(2):91-99
Views149See moreAbstract
Objective
To investigate the dietary total antioxidant capacity (DTAC) of pregnant women, and associated factors.
Methods
Cross-sectional study conducted with 785 pregnant adult women attended in primary health care centers of Ribeirão Preto, state of São Paulo, Brazil. Two 24-hour dietary recalls were obtained, and the usual intake was estimated through the Multiple Source Method. The DTAC was estimated using the ferric reducing antioxidant power assay. The relationship between the higher DTAC estimate (≥ median of 4.3 mmol/day) and associated factorswas investigated usingadjusted logisticmodels with backward selection.
Results
In total, 25% of the pregnant women were classified as overweight, and 32% as obese. Themedian (P25, P75)DTAC was 4.3 (3.3-5.6)mmol/day. Through adjusted logistic regression models with backward selection, a higher chance of DTAC estimates above the median among pregnant womenaged ≥ 35 years old (2.01 [1.24-3.27])was verified when compared with younger pregnant women. Women with prepregnancy overweight (0.63 [0.45-0.89]) and obesity (0.59 [0.40-0.88]) presented a lower chance of DTAC estimates above the median when compared with eutrophic pregnant women. A higher DTAC estimate was positively associated with the use of dietary supplements (1.39 [1.03-1.88]), and negatively associated with total dietary energy (0.59 [0.42-0.85]).
Conclusion
The DTAC estimate over the median was associated with greater age, adequate body weight, use of dietary supplements, and lower energy intake.
Views149Abstract
Original ArticleEstimate of Dietary Total Antioxidant Capacity of Pregnant Women and Associated Factors Estimativa da capacidade antioxidante total da dieta de gestantes e fatores associados
Revista Brasileira de Ginecologia e Obstetrícia. 2022;44(2):91-99
Views149See moreAbstract
Objective
To investigate the dietary total antioxidant capacity (DTAC) of pregnant women, and associated factors.
Methods
Cross-sectional study conducted with 785 pregnant adult women attended in primary health care centers of Ribeirão Preto, state of São Paulo, Brazil. Two 24-hour dietary recalls were obtained, and the usual intake was estimated through the Multiple Source Method. The DTAC was estimated using the ferric reducing antioxidant power assay. The relationship between the higher DTAC estimate (≥ median of 4.3 mmol/day) and associated factorswas investigated usingadjusted logisticmodels with backward selection.
Results
In total, 25% of the pregnant women were classified as overweight, and 32% as obese. Themedian (P25, P75)DTAC was 4.3 (3.3-5.6)mmol/day. Through adjusted logistic regression models with backward selection, a higher chance of DTAC estimates above the median among pregnant womenaged ≥ 35 years old (2.01 [1.24-3.27])was verified when compared with younger pregnant women. Women with prepregnancy overweight (0.63 [0.45-0.89]) and obesity (0.59 [0.40-0.88]) presented a lower chance of DTAC estimates above the median when compared with eutrophic pregnant women. A higher DTAC estimate was positively associated with the use of dietary supplements (1.39 [1.03-1.88]), and negatively associated with total dietary energy (0.59 [0.42-0.85]).
Conclusion
The DTAC estimate over the median was associated with greater age, adequate body weight, use of dietary supplements, and lower energy intake.
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Original Article04-04-2007
Effects of 17beta-estradiol replacement on cardiac oxidative damage in rats submitted to ovarian hormone deprivation
Revista Brasileira de Ginecologia e Obstetrícia. 2007;29(1):27-33
Abstract
Original ArticleEffects of 17beta-estradiol replacement on cardiac oxidative damage in rats submitted to ovarian hormone deprivation
Revista Brasileira de Ginecologia e Obstetrícia. 2007;29(1):27-33
DOI 10.1590/S0100-72032007000100005
Views146PURPOSE: to evaluate oxidative stress in cardiac tissue of ovariectomized rats, with and without hormonal therapy. METHODS: female Wistar rats were divided in three groups: control group (CG); ovariectomized group (OG); ovariectomized group with estrogen supplementation (ESG). The estrogen deprivation was done through bilateral ovariectomy. After one week from the ovariectomy, a pellet of 1.5 mg of 17beta-estradiol was implanted in the ESG animals. Nine weeks after the ovariectomy, cardiac tissue was obtained for the analysis of the oxidative stress through CL (chemiluminescence), and measurement of antioxidant enzymes catalase (CAT), superoxide dismutase (SOD) and gluthatione peroxidase (GPx). RESULTS: CL was increased in the OG (7348±312 cps/mg protein) when compared with the CG (6250±41 cps/mg protein, p<0.01), but there was no significant difference between the CG and the ESG (6170±237 cps/mg protein). Ovariectomy reduced SOD (35%, p<0.05) and CAT (22%, p<0.001) activities in the OG as compared with the CG. Hormonal therapy normalized antioxidant enzymes activities in the ESG. There was no statistically significant difference in GPx activity among the groups studied. CONCLUSIONS: ovarian hormone deprivation induced an increase of oxidative stress with reduction of antioxidant defenses in the cardiac tissue. However, hormonal therapy prevented oxidative stress after ovariectomy, probably due to an increase of the CAT and SOD activities in the cardiac muscle. These findings suggest an important oxidative stress contribution in cardiovascular dysfunctions observed in women after menopause, reinforcing the importance of hormonal therapy in the management of cardiovascular diseases risk in this group of women.
Key-words AntioxidantsEstrogen replacement therapyHormone replacement therapyLipid peroxidationOxidative stressSee moreViews146Abstract
Original ArticleEffects of 17beta-estradiol replacement on cardiac oxidative damage in rats submitted to ovarian hormone deprivation
Revista Brasileira de Ginecologia e Obstetrícia. 2007;29(1):27-33
DOI 10.1590/S0100-72032007000100005
Views146PURPOSE: to evaluate oxidative stress in cardiac tissue of ovariectomized rats, with and without hormonal therapy. METHODS: female Wistar rats were divided in three groups: control group (CG); ovariectomized group (OG); ovariectomized group with estrogen supplementation (ESG). The estrogen deprivation was done through bilateral ovariectomy. After one week from the ovariectomy, a pellet of 1.5 mg of 17beta-estradiol was implanted in the ESG animals. Nine weeks after the ovariectomy, cardiac tissue was obtained for the analysis of the oxidative stress through CL (chemiluminescence), and measurement of antioxidant enzymes catalase (CAT), superoxide dismutase (SOD) and gluthatione peroxidase (GPx). RESULTS: CL was increased in the OG (7348±312 cps/mg protein) when compared with the CG (6250±41 cps/mg protein, p<0.01), but there was no significant difference between the CG and the ESG (6170±237 cps/mg protein). Ovariectomy reduced SOD (35%, p<0.05) and CAT (22%, p<0.001) activities in the OG as compared with the CG. Hormonal therapy normalized antioxidant enzymes activities in the ESG. There was no statistically significant difference in GPx activity among the groups studied. CONCLUSIONS: ovarian hormone deprivation induced an increase of oxidative stress with reduction of antioxidant defenses in the cardiac tissue. However, hormonal therapy prevented oxidative stress after ovariectomy, probably due to an increase of the CAT and SOD activities in the cardiac muscle. These findings suggest an important oxidative stress contribution in cardiovascular dysfunctions observed in women after menopause, reinforcing the importance of hormonal therapy in the management of cardiovascular diseases risk in this group of women.
Key-words AntioxidantsEstrogen replacement therapyHormone replacement therapyLipid peroxidationOxidative stressSee more
Antioxidants Archives - Revista Brasileira de Ginecologia e Obstetrícia
