Fertility-related Characteristics Research Articles

Retrospective Analysis of Outcomes in the 2023 Busan Korean Medicine infertility Treatment Support Project

Objectives: This study aimed to analyze the results and review the outcomes and satisfaction levels of the 2023 Busan Korean medicine infertility treatment support project.Methods: A total of 137 female and 26 male participated in the Korean medicine infertility treatment support project, which encompassed herbal medicine and pharmacopuncture treatment over 4-month period. Data pertaining to patients' general, demographic, and fertility-related characteristics were collected before treatment initiation. During treatment, information regarding the treatments administered by Korean medical doctors was recorded, along with post-treatment outcomes and satisfaction levels.Results: Out of 163 initially enrolled participants, data from 4 female participants were missing, data from 159 participants were analyzed. A total of 113 female and 22 male participants completed the treatment program (Completion rate 84.9%). Of these, 23 female participants achieved pregnancy (Pregnancy rate 20.4%). Participants reported a high level of satisfaction with the treatment support project, with an average satisfaction score of 9.4 out of 10.Conclusions: The study analyzed the clinical findings of the 2023 Busan Korean medicine infertility treatment support project. These findings provide a basis for developing Korean medicine infertility support projects and related research.

Article Review: Effect of Electronic Cigarette on Fertility in Male

Numerous researches have shown that blood plasma, sperm parameters, or a host of other fertility-related characteristics are adversely affected by the components of cigarette smoking. However, it's unclear how smoking really affects fertility in men. Depending on the well-established scientific observation that smoking enhances the amount of radical oxide organisms, which in turn causes oxidative stress (OS), smoking has an influence on the sperm variables. Men are affected by OS as it damages seminal characteristics including survival that appearance as well as inhibits sperm functioning. Still, not every research has reached identical findings. This research evaluates the influence of tobacco use via non-smoking methods on male infertility on clarifies the contentious relationship among smoking on fertility in men. Additionally, it explores the therapeutic consequences of the evidence—which includes recently discovered genomic or regulatory data—that tie smoking to male infertility.

Bovine FRAS1: mRNA Expression Profile, Genetic Variations, and Significant Correlations with Ovarian Morphological Traits, Mature Follicle, and Corpus Luteum.

The amelioration of bovine fertility caused by a multi-factorial problem has always been a hot topic, among which the detection of available target genes is the most crucial. It was hypothesized that the Fraser extracellular matrix complex subunit 1 (FRAS1) gene detected by GWAS is involved in physiological activities such as ovarian development. Herein, unilateral ovaries from 2111 cows were used to examine the mRNA expression profile and polymorphisms of bovine FRAS1 and their associations with fertility-related characteristics. Firstly, it was confirmed that FRAS1 gene transcripts are expressed in various bovine tissues. Then, among five potential insertion-deletion (indel) loci, the 20 bp (named P3-D20-bp) and 15 bp (P4-D15-bp) deletion mutations were confirmed to be polymorphic with linkage equilibrium. Secondly, the P3-D20-bp polymorphism was significantly associated with ovarian weight and corpus luteum diameter in the metaestrus phase and ovarian length in the dioestrum stage. Additionally, both ovarian length and mature follicle diameter in metaestrus are significantly correlated with different genotypes of P4-D15-bp. Thirdly, the transcriptional expression of the FRAS1 gene in groups with a minimum value of ovarian weight or volume was significantly higher than the expression in groups with a maximum value. Instead of that, the more corpus luteum and mature follicles there are, the higher the transcription expression of the FRAS1 gene is. Furthermore, FRAS1 expression in cows with a heterozygous genotype (ID) of P3-D20-bp was significantly higher than others. Eventually, P3-D20-bp deletion could disturb the binding efficiency of WT1-I and Sox2 to FRAS1 sequence according to binding prediction, indicating that mutation may affect gene expression and traits by influencing the binding of transcription factors. Overall, the polymorphisms of P3-D20-bp and P4-D15-bp of the bovine FRAS1 gene significantly correlated to follicle or ovarian traits that could be applied in optimizing female fertility in cow MAS breeding programs.

Characterization of Fertility Clinic Attendees in the Abu Dhabi Emirate, United Arab Emirates: A Cross-Sectional Study.

This study describes the primary and secondary infertility in patients attending fertility clinics and reports factors associated with primary infertility. A cross-sectional survey was conducted in two fertility clinics in Abu Dhabi Emirate, United Arab Emirates (UAE) between December 2020 and May 2021. The collected information covered sociodemographic, lifestyle, medical, and fertility-related characteristics. The mean age and age at marriage (±SD) of the 928 patients were 35.7 (±6.7) and 25.2 (±6.3) years, respectively. Of the total, 72.0% were obese and overweight, 26.6% reported a consanguineous marriage, and 12.5% were smokers. Secondary infertility (62.5%) was more frequent than primary infertility (37.5%). Primary infertility was inversely associated with age (aOR, 0.94, 95% CI: 0.91-0.98) and not being overweight (aOR, 0.6, 95% CI: 0.4-0.9) while positively associated with a nationality other than Middle Eastern nationality (aOR, 1.9, 95% CI: 1.1-3.3), married for ≤5 years (aOR, 6.0, 95% CI: 3.9-9.3), in a nonconsanguineous marriage (aOR, 2.4, 95% CI: 1.5-3.9), having a respiratory disease (aOR, 2.3, 95% CI: 1.1-4.6), an increased age at puberty (aOR, 1.2, 95% CI: 1.0-1.3), and self-reported 6-<12 months (aOR, 2.4, 95% CI: 1.2-5.1) and ≥12 months (aOR, 3.4, 95% CI: 1.8-6.4) infertility. Patients with primary infertility were more likely to be diagnosed with infertility of an ovulation, tubal, or uterine origin (aOR, 3.9, 95% CI: 1.9-7.9). Secondary infertility was more common than primary infertility. Several preventable fertility-related risk factors including overweight, smoking, and diabetes were found to be common among the fertility clinic attendees.

Childbearing intentions, fertility awareness knowledge and contraceptive use among female university students in Cameroon.

ObjectivesThe primary objective of this study was to examine the association between fertility awareness knowledge, and contraceptive use among sexually active female university students (FUS) in Cameroon.MethodsThis study was designed as a secondary data analysis of a cross-sectional survey that was conducted between July and August 2018. We extracted and analyzed relevant data (i.e., socio-demographic characteristics, sexual behavior, fertility-related characteristics, and contraceptive use) using a modified Poisson regression with a robust variance estimator. Prevalence Ratios (PR) and 95% confidence intervals were estimated, and statistical significance was set at P≤0.05.ResultsThe median age of the sexually active FUS was 23 years (IQR = 21–25) and 99.3% indicated that they wanted to have children. Only 49.3% knew their fertile period and 62.5% of the sexually active FUS were current contraceptive users. We found a statistically significant association between fertility awareness knowledge and period abstinence (PR = 1.57;95%CI: 1.02–2.44, p = 0.049). In multivariate adjusted models, there was a statistically significant association between fertility awareness knowledge and male condom use (APR = 1.29; 95% CI:1.02–1.64, p-value = 0.032) and the withdrawal method (APR = 1.40;95% CI:1.02–1.93, p = 0.038). We found a statistically significant effect modification of “preferred timing to have children” on the association between fertility awareness knowledge and withdrawal method use. There was no association between fertility awareness knowledge and the use of oral contraceptive pills.ConclusionMost of the female students intend to have children in the future, but their fertility awareness knowledge was suboptimal. There was a statistically significant relationship between fertility awareness knowledge, and the use of male condoms and the withdrawal method. The study underscores the need for FUS to be targeted with interventions to help them gain knowledge of their menstrual cycle to better plan or avoid unwanted pregnancy.

Stress and depression among infertile couples: A cross-sectional study from a government fertility clinic

Background: Infertility is usually associated with long-term stress, which can manifest as anxiety and depressive symptoms. The goal of this study is to look into the emotional well-being of couples dealing with infertility challenges, as well as to look into the causes of anxiety and despair in these couples.Methods: The research was conducted in a government clinic set up at New Delhi, India with the participation of two hundred couples (400 participants), who were attending there for treatment purposes. The Fertility Problem Inventory (FPI) and the Hamilton Depression Score (HAM-D) were utilized to develop the questionnaire. We also interviewed our subjects to find out more about their sociodemographic and fertility-related characteristics. To evaluate our hypotheses, we used independent-samples t-tests (M SD) and the chi-square test.The objective of the study: The study's goal was to assess the stress and sadness experienced by infertile couples who visited government infertility clinics, as well as to determine the independent variables that may have been associated with infertility. These characteristics included age, sex, educational qualification, profession, infertility period, and type of family.Results: Infertile women were younger (48% were in 26 to 30 years), while 40% of men were 31-35 years old. However, females experienced a much lower level of psychological well-being. Anxiety and depression in infertile couples were linked with age, marriage duration, social issues, sexual issues, and marital relationship tension. Financial stress was also associated with trait anxiety. Our method could explain 58 percent of the variance in depressive symptoms and 62 percent of the variance in anxiety-related symptoms.Conclusions: Symptoms of depression and anxiety in infertile couples were present prominently. It caused an impact on marital & sexual relationships. It is essential to encourage the monitoring of these markers as well as the treatment of underlying stress through suitable psychological therapies.

Infertility-Related Stress and Psychological Health Outcomes in Infertile Couples Undergoing Medical Treatments: Testing a Multi-dimensional Model.

The study aims to propose and test a multi-dimensional infertility-related stress model including socio-demographic and fertility-related characteristics, infertility-related stress dimensions, coping strategies and couple's dyadic adjustment dimensions as predictors of anxiety and depression among partners of couples undergoing infertility treatments. Both members of 250 infertile couples filled out a questionnaire consisting of Socio-demographics (Age; Educational level; Employment status), Fertility-related characteristics (Type of diagnosis; Duration of infertility), Fertility Problem Inventory-Short Form, Coping Orientations to Problem Experienced-New Italian Version, Dyadic Adjustment Scale, State-Trait Anxiety Inventory-Y and Edinburgh Depression Scale. Hierarchical Multiple Linear Regressions indicated that the proposed predictive models for anxiety and depression were significant and had good levels of fit with the data. Gender differences emerged in predictor variables. Findings provide valid predictive models that could be adopted to assess psychological health in infertile patients and to develop evidence-based and tailored counselling interventions at centres for assisted reproduction.

Trends, patterns and determinants of long-acting reversible methods of contraception among women in sub-Saharan Africa.

BackgroundMethod-specific contraceptive prevalence varies widely globally, as huge variations exist in the use of different types of contraception, with short-term methods being the most common methods in sub-Saharan Africa (SSA). Evidence is scanty on the trends, patterns and determinants of long-acting reversible contraceptive (LARC) methods in SSA. This study aimed to address this knowledge gap.MethodsUsing a pseudo longitudinal research design and descriptive and inferential statistics, we analysed Demographic and Health Survey data of eight countries selected on the basis of contraceptive prevalence rates across SSA. Multinomial logistic regression modelling was used to tease out the predictors of the uptake of LARC methods in the selected countries.ResultsFindings exhibit a steady but slow upward trend in LARC methods across selected countries, as a marginal increase was recorded in LARC uptake over a 10-year period in many of the selected countries. Results established significant predictors of LARC methods uptake, including fertility-related characteristics, age, level of education, work status, wealth index and exposure to mass media. This study underscored the need to address various barriers to the uptake of LARC methods in SSA. It is recommended that governments at different levels undertake to cover the costs of LARC methods in order to increase access and uptake.

Long acting reversible contraception use and associated factors among married women of reproductive age in Nepal.

Modern contraceptives are highly effective and proven means of preventing unintended pregnancy and reducing maternal mortality. Social and economic characteristics are some of the key determinants of health and utilization family planning. However, studies examining the factors associated with utilization of long acting reversible contraception (LARC) are limited in Nepal. This study assessed the factors associated with utilization of LARC methods among married women of reproductive age in Nepal. Secondary data analysis was conducted using the 2016 Nepal Demographic and Health Survey (NDHS). A logistic regression model examined the association of socioeconomic, demographic, or fertility related characteristics with the use of LARCs among 9875 ever married women of reproductive age. The overall utilization rate of LARC in this study was 4.7%. Women in the age group of <25 years (AOR: 0.65, 95% CI: 0.45–0.92) and 25–35 years (AOR: 0.70, 95% CI: 0.56–0.89), having husbands with primary education (AOR:0.71; 95%CI: 0.64–0.84) and no education (AOR: 0.54; 95%CI: 0.38–0.73), belonging to Janajatis (AOR: 0.55; 95%CI: 0.42–0.71) and Newars (AOR: 0.29; 95%CI: 0.19–42), poor wealth quintile (AOR: 0.60; 95% CI: 0.45–0.86) had negative association with LARC use. On the other hand, women having their husband as a skilled worker (AOR: 1.49; 95%CI: 1.10–2), having two or less than two children (AOR: 1.46; 95% CI: 1.15–1.186), and having desire for children in future (AOR: 3.24; 95% CI: 2.29–4.57) had positive association with the use of LARC. In this study, younger women’s age, low or no husband’s education, from indigenous community such as Janajati and Newer, being in lowest wealth quintile negatively influenced the use of LARC. Conversely, women having her husband as skilled worker, parity less than two, and desire of having future children, positively influenced the use of LARC. The study highlights the need to reach women who were in the lower socioeconomic background to improve LARC use.

Intimate partner violence and fertility-related issues: A cross-sectional survey of women attending antenatal clinic at the university college hospital, Ibadan

Background: Intimate partner violence (IPV) in pregnancy is of great public health importance because it involves two lives (mother and fetus). It is a range of behavior exhibited by a current or former partner with the potential of causing physical, emotional, or sexual harm to the receiver. This study aims to establish the prevalence and predictors of IPV and its association with fertility-related characteristics and behaviors. Methods: A descriptive cross-sectional survey involving 322 consenting pregnant women. A semi-structured self-administered questionnaire was employed for data collection. Data were analyzed using the Statistical Package for Social Sciences version 20. Results: The mean age of the respondents was 30.8 ± 4.5 years with parity ranging from 0 to 5. The prevalence of IPV was higher (81.0%) among respondents who had children compared to those who had no children (19.0%). The common forms of IPV experienced by the women in this study were shouting (86.7%), verbal abuse (76.2%), and slapping (57.1%). Other serious forms of IPV experienced included forced sex (14.3%) and threats to the life of the respondents (4.8%). Polygamy and low educational attainment were strong predictors of IPV risk (P 0.05). Conclusion: IPV is an unpalatable event. The prevalence rate of IPV was 6.5% in this study with the most common forms being shouting and verbal abuse. Polygamy and low educational attainment were significant risk factors for IPV. The desire for conception in this study was 76.2% with IPV prevalence slightly higher in respondents with children (7.9%). Educating the girl child would bring stability to the home by reducing the prevalence of IPV.

The fertility of internal migrants to Kinshasa

The rapid population growth of many African cities has important implications for population health, yet little is known about factors contributing to increasing population, such as the fertility of internal migrants. We examine whether in-migrants to Kinshasa have different fertility patterns than lifetime Kinshasa residents, and identify characteristics of migrants that may explain differences in fertility. We also use detailed migration histories to examine whether fertility differs by features of migration. We use representative data from the PMA2020 Project for 2197 women in Kinshasa, including 340 women who moved to Kinshasa. We examine differences between migrants and non-migrants in fertility and other fertility-related characteristics. We also examine whether fertility differs by duration of residence in Kinshasa, number of lifetime moves, age at first migration, urban/rural classification of birthplace, and the distinction between intra-Kinshasa migration and migration to Kinshasa.. Migrants have significantly higher fertility than permanent Kinshasa residents, but the difference is relatively small in magnitude. This higher fertility appears due in part to patterns of contraceptive use among migrants. There is noteworthy heterogeneity among migrants: higher fertility among migrants is associated with longer duration in Kinshasa, more lifetime moves, urban-Kinshasa migration, older age at first migration, and moving to Kinshasa from outside (as opposed to intra-Kinshasa migration).

General practitioners' adherence to work-up and referral recommendations in fertility care.

What is the current guideline adherence by general practitioners (GPs) for work-up and subsequent referral from primary to secondary care for patients suffering from infertility? Guideline adherence by GPs concerning infertility was 9.2% in couples referred. Adherence to recommendations can decrease unnecessary referral, diagnostics and treatments, and consequently result in lower expenditures. Moreover, patients can be saved from unnecessary hospital visits, emotional burden and out of pocket costs. A retrospective cohort study among 306 patients referred for basic fertility work-up between January 2011 and June 2013 from primary care to a secondary care teaching hospital or a tertiary hospital with IVF facilities. Couples were eligible to participate when there was no previous referral for fertility problems and the duration of the child wish was <2 years. Data to assess guideline adherence were collected from the referral letter and the medical records. A patient questionnaire was used to determine patients' general and fertility-related characteristics. The GP performed a Chlamydia Antibody Titre (CAT) testing and semen analysis as recommended in 15.9% and 42.2% of the referred patients, respectively. According to the guideline, 39% of the couples were under referred (i.e. not immediately referred as recommended), 8.8% were unnecessarily referred and the CAT and semen analysis were unnecessarily repeated in secondary care in 80.0% and 57.1% of cases, respectively. We could not include non-referred patients with expectant management in primary care, an unknown number of whom became pregnant in this period. This may have resulted in an underestimation of primary care performance. Our findings show that guideline adherence concerning work-up and subsequent referral for fertility problems is low. The influence of patient demands for referral remains largely unknown. Barriers and facilitators for guideline adherence should be determined to develop interventions to improve guideline adherence in the areas of work-up and referral for fertility care and to diminish duplicate tests in secondary care. Funded by CZ, a Dutch healthcare insurer (grant number AFVV 11-232). CZ had no role in designing the study, data collection, analysis and interpretation of data or writing of the report. Competing interests: None. Not applicable.

Determinants of fertility desire among married or cohabiting individuals in Rakai, Uganda: a cross-sectional study

BackgroundRecent trends in fertility rates indicate declines in total fertility rate (TFR) in some sub-Saharan African countries. However, countries such as Uganda continue to have a persistently high TFR partly attributed to strong preferences for large family sizes. We explored the factors that influence fertility desire among married or cohabiting individuals in Rakai, a rural district in southwestern Uganda.MethodsThis cross-sectional study of fertility desire (desire to have another child) was nested in a cluster-randomized demand-creation intervention trial for the promotion of couples’ HIV counseling and testing uptake among married or cohabiting individuals that was conducted in Rakai district between March 1 and April 30, 2015. A total of 1490 married or cohabiting individuals, resident in three study regions with differing background HIV prevalence, were enrolled into the study. Data were collected on socio-demographic, behavioral and fertility-related characteristics. We used a modified Poisson regression model to generate prevalence ratio (PR) as a measure of association for factors that were independently associated with fertility desire. We adjusted for clustering at community level and used STATA version 14.0 for all analyses.ResultsOverall, fertility desire was high (63.1%, n = 940); higher in men (69.9%, n = 489) than women (57.1%, n = 451). More than three-quarters (78.8%, n = 1174) had 3+ biological children while slightly more than two-thirds (68.5%, n = 1020) reported an ideal family size of 5+ children. Only 30% (n = 452) reported that they had attained their desired family size. After adjusting for potential and suspected confounders, the factors that were negatively associated with fertility desire were: age 30–39 (adjusted prevalence ratio [aPR] = 0.82, 95% CI: 0.78, 0.86) and 40+ years (aPR = 0.65, 95% CI: 0.60, 0.71); having six or more biological children (aPR = 0.88, 95% CI: 0.80, 0.97); being HIV-positive (aPR = 0.86, 95% CI: 0.78, 0.95) and ever use of any family planning methods (aPR = 0.93, 95% CI: 0.87, 0.99). Being male (aPR = 1.19, 95% CI: 1.07, 1.33); having primary education (aPR = 1.21, 95% CI: 1.01, 1.44) and having not yet attained the desired family size (aPR = 4.34, 95% CI: 3.50, 5.38) were positively associated with fertility desire.ConclusionHaving not yet attained one’s desired family size, being male and having primary education were positively associated with fertility desire in this population. Targeting individuals who have not yet attained their desired family size, men and less educated individuals with fertility regulation interventions may help to reduce fertility desire in this population.

Fertility studies in female childhood cancer survivors: selecting appropriate comparison groups

Little information is available on the use of appropriate comparison groups for studies investigating late effects of childhood cancer. Two comparison groups in a nationwide study on reproductive function and ovarian reserve in female childhood cancer survivors were recruited (The Dutch Childhood Oncology Group Long-Term Effects After Childhood Cancer Cohort Study). Experiences of this process are reported. Two types of comparison groups were used: sisters of participating survivors and controls from the general population. A total of 352 out of 580 (61%) of the participating survivors who had a sister gave permission to invite them for the study. The participation rate of sisters was much higher than control participants from the general population (74% versus 21%, respectively), whereas considerably more effort was involved in recruiting controls from the general population. Participants in this group were significantly older and more highly educated than sister controls (P < 0.001 for both groups). No significant differences were observed between both types of comparison groups in several fertility-related characteristics, suggesting minimal bias owing to selective participation. Researchers setting up a study to investigate late effects among survivors of childhood cancer should carefully consider the advantages and disadvantages of using various types of comparison groups.

Socio-demographic and fertility-related characteristics and motivations of oocyte donors in eleven European countries

Do the socio-demographic and fertility-related characteristics and motivations of oocyte donors differ in European countries? The socio-demographic and fertility-related characteristics and motivations of oocyte donors differ considerably across countries. There have been no other international studies comparing the characteristics of oocyte donors. Regarding their motivations, most studies indicate mixed motives. The proposed study was a transversal epidemiological study. Data were collected from 63 voluntarily participating assisted reproduction technology centres practising oocyte donation in 11 European countries (Belgium, Czech Republic, Finland, France, Greece, Poland, Portugal, Russia, Spain, UK and Ukraine). The survey was conducted between September 2011 and June 2012 and ran for 1-6 calendar months depending on the number of cycles of oocyte donation performed at the centre. The sample size was computed in order to allow an estimate of the percentage of a relatively rare characteristic (∼2%) with a precision (95% confidence interval) of 1%. The calculation gave 1118 donors. In total, 1423 forms were obtained from oocyte donors. All consecutive donors in these centres filled out an anonymous questionnaire when they started their hormonal stimulation, asking for their socio-demographic and fertility-related characteristics, their motivations and compensation. Population characteristics were described and compared by country of donation. Motives for donation and mean amount of money were compared between countries and according to the donors characteristics. The socio-demographic and fertility-related characteristics and motivations of oocyte donors varied enormously across European countries. The number of received forms corresponded with a participation rate of 61.9% of the cycles performed by the participating centres. Mean age was 27.4 years. About 49% of donors were fully employed, 16% unemployed and 15% student. The motivation in the total group of donors was 47.8% pure altruism, 33.9% altruism and financial, 10.8% pure financial, 5.9% altruism and own treatment and finally 2% own treatment only. About 15% of the donors were egg sharers (patient donors), mainly from the UK and Poland. Women were donating for the first time in 55.4% of cases, for the second time in 20.3% and for the third time in 12.8%. The motivation to donate was significantly related to being of foreign origin (P < 0.01), age (P < 0.001), living in couple or not (P < 0.01), level of education (P < 0.001) and number of donations (P < 0.001). The amount of compensation differed considerably between centres and/or countries. The general donor profile in this study was a well-educated, 27-year-old woman living with her partner and child who mainly donated to help others. The selection of clinics in some countries and the limited participation rate may have led to a bias in donor characteristics. A possible effect of social desirability in the answers by the donors should be taken into account. The diversity of the donor population reflects the differences in European legislation (for example, on anonymity and payment) and economic circumstances. The differences in systems of reimbursement/payment demonstrate the need to have a thorough discussion on the specific meaning of these terms. The study was funded by the European Society for Human Reproduction and Embryology. The authors declare no conflicting interests.

A quality assurance initiative for commercial-scale production in high-throughput cryopreservation of blue catfish sperm

Cryopreservation of fish sperm has been studied for decades at a laboratory (research) scale. However, high-throughput cryopreservation of fish sperm has recently been developed to enable industrial-scale production. This study treated blue catfish (Ictalurus furcatus) sperm high-throughput cryopreservation as a manufacturing production line and initiated quality assurance plan development. The main objectives were to identify: (1) the main production quality characteristics; (2) the process features for quality assurance; (3) the internal quality characteristics and their specification designs; (4) the quality control and process capability evaluation methods, and (5) the directions for further improvements and applications. The essential product quality characteristics were identified as fertility-related characteristics. Specification design which established the tolerance levels according to demand and process constraints was performed based on these quality characteristics. Meanwhile, to ensure integrity throughout the process, internal quality characteristics (characteristics at each quality control point within process) that could affect fertility-related quality characteristics were defined with specifications. Due to the process feature of 100% inspection (quality inspection of every fish), a specific calculation method, use of cumulative sum (CUSUM) control charts, was applied to monitor each quality characteristic. An index of overall process evaluation, process capacity, was analyzed based on in-control process and the designed specifications, which further integrates the quality assurance plan. With the established quality assurance plan, the process could operate stably and quality of products would be reliable.