Pregnancy In Japan Research Articles

The Use of Japanese Traditional (Kampo) Medicines Before and During Pregnancy in Japan: The Tohoku Medical Megabank Project Birth and Three-Generation Cohort Study.

Japanese traditional (Kampo) medicines are often used for pregnant women in Japan. However, no comprehensive studies have been conducted regarding the self-reported use of these medicines during pregnancy. This study investigated the use of Kampo medicines during pregnancy in Japan using the Tohoku Medical Megabank Project Birth and Three-Generation Cohort Study (TMM BirThree Cohort Study). Questionnaires were distributed to pregnant women participating in the TMM BirThree Cohort Study (July 2013 to March 2017) at approximately 12 weeks (early pregnancy) and 26 weeks (middle pregnancy). We analysed Kampo medicines use over three periods: (1) 12 months before pregnancy diagnosis, (2) the period between pregnancy diagnosis and around Week 12 of pregnancy and (3) from around Week 12 of pregnancy. In total, 19 220 women were included in the analysis. The proportions using prescribed Kampo medicines were 4.1% before pregnancy diagnosis, 4.5% from diagnosis to Week 12% and 4.5% after Week 12 of pregnancy. The most frequently prescribed Kampo medicines were tokishakuyakusan (1.0%) before pregnancy diagnosis, shoseiryuto (1.3%) from diagnosis to Week 12 and shoseiryuto (1.5%) Post-week 12. Sixty of the pregnant women used Kampo medicines containing crude drugs, which should be administered cautiously during pregnancy. The proportion of Kampo medicines use before and during pregnancy was 4%-5%. Some pregnant women used Kampo medicines containing crude drugs that should be administered cautiously during pregnancy. Further research is required to determine the safety of Kampo medicines during pregnancy.

Clinical challenges in early pregnancy in Japan: An update on gestational diabetes.

Clinical challenges in early pregnancy in Japan: An update on gestational diabetes.

Health care provider system for hypertensive disorders of pregnancy in Japan

Health care provider system for hypertensive disorders of pregnancy in Japan

National trends in treatments for ectopic pregnancy in Japan from 2010 to 2020: a retrospective observational study

Background Ectopic pregnancy (EP) can be treated surgically or nonsurgically. In many countries, methotrexate is frequently used as a first-line medical treatment, and its effect is similar to that of surgery in selected patients. We aimed to investigate national trends in the treatment of EP in Japan. Methods We conducted a retrospective observational analysis between 2010 and 2020 using a nationwide claims database that included inpatient data. We identified female inpatients with EP aged 15 to 49 years old. We analysed year-to-year treatment trends for EP, as well as year-to-year trends in methotrexate administration, with a focus on the site of the pregnancy. Patients who received methotrexate were divided into two groups: Those with and those without surgery after methotrexate use. We compared the characteristics of these groups and calculated the methotrexate success rate. Results We identified 53,653 patients with EP. The proportion of patients undergoing surgery increased from 79% in 2010 to 83% in 2020, whereas the proportion of methotrexate therapy decreased from 8.1% in 2010 to 5.1% in 2020. Regarding methotrexate use for the site of the pregnancy, there was a significant downward trend in methotrexate therapy for tubal pregnancies. Notably, the methotrexate success rate was 84% during the study period. Conclusions Surgery showed an increasing tendency over time, whereas methotrexate therapy showed a decreasing tendency for EP treatment in Japan. The efficacy of methotrexate in Japan was comparable to that observed in other countries.

Medication use before and during pregnancy in Japan: the Tohoku Medical Megabank Project Birth and Three-Generation Cohort Study

PurposeTo elucidate the status of medication use among pregnant women in Japan, by means of a multigenerational genome and birth cohort study: the Tohoku Medical Megabank Project Birth and Three-Generation Cohort Study (TMM BirThree Cohort Study).MethodsQuestionnaires were distributed to pregnant women participating in the TMM BirThree Cohort Study (from July 2013 to March 2017) around 12 weeks (early pregnancy) and 26 weeks (middle pregnancy). We analysed medication use over three periods: (1) 12 months prior to pregnancy diagnosis, (2) the period between pregnancy diagnosis and around week 12 of pregnancy, and (3) post around week 12 of pregnancy.ResultsIn total, 19,297 women were included in the analysis. The proportion of pregnant women using medications was 49.0% prior to pregnancy diagnosis, 52.1% from diagnosis to week 12, and 58.4% post week 12 of pregnancy. The most frequently prescribed medications were loxoprofen sodium hydrate (5.5%) prior to pregnancy diagnosis, magnesium oxide (5.9%) from diagnosis to week 12, and ritodrine hydrochloride (10.5%) post week 12 of pregnancy. The number of women who used suspected teratogenic medications during early pregnancy was 96 prior to pregnancy diagnosis, 48 from diagnosis to week 12, and 54 post week 12 of pregnancy.ConclusionWe found that ~ 50% of the pregnant women used medications before and during pregnancy and some took potential teratogenic medications during pregnancy. In birth genomic cohort study, it is expected that investigations into the safety and effectiveness of medications used during pregnancy will advance.

Real-world survey of eating attitudes and spending behaviors related to healthy foods/supplements in women seeking to become pregnant

Since 2022, fertility treatments have been partially covered by insurance in Japan. Women who wish to become pregnant may explore various means of conception as fertility treatments have shown low success rates. Therefore, we aimed to clarify the state of knowledge, behavior, and attitudes toward health foods among women who are actively trying to become pregnant. A web-based research company surveyed the eating attitudes and behaviors towards healthy foods of 900 women seeking to become pregnant. Regression analysis for the total amount spent on pregnancy was conducted, with "amount spent on actions undertaken to conceive" as the dependent variable. Multiple regression analysis on actions undertaken to conceive was performed using age, family income, body mass index, duration of hospital visits, duration of actions undertaken to conceive, cumulative amount incurred to conceive, awareness of dietary guidelines, adherence to dietary practices, number of types of health foods and supplements, whether participants considered consumption of nutritious foods and supplements to be important, and cumulative amount spent on healthy foods and supplements. The effect size for the Chi-square test was determined with Cramer's coefficient of association. Increasing age was associated with a longer time to conceive, longer hospital visits, higher conception costs (including fertility treatment), and a higher intake of healthy food products. The number of healthy food types had the greatest impact on the cost incurred to conceive. Folic acid was the most commonly consumed healthy food, followed by iron and calcium. This study clarified the real-world situation regarding healthy foods for women seeking pregnancy in Japan. The information necessary for pregnant women to select safe healthy foods was clarified, which may lead to the establishment of risk-communication measures to ensure safety.

Genome-wide association study of nausea and vomiting during pregnancy in Japan: the TMM BirThree Cohort Study

BackgroundNausea and vomiting during pregnancy (NVP) and hyperemesis gravidarum (HG), common conditions affecting most pregnant women, are highly heritable and associated with maternal and fetal morbidity. However, the pathologies underlying NVP and HG and their associated loci are scarce.MethodsWe performed genome-wide association studies (GWAS) of NVP in pregnant women (n = 23,040) who participated in the Tohoku Medical Megabank Project Birth and Three-Generation Cohort Study in Japan from July 2013 to March 2017. Participants were divided into discovery (n = 9,464) and replication (n = 10,051) stages based on the platform used for their genotyping. Loci that achieved the genome-wide significance level (p < 5.0 × 10− 8) in the discovery stage were selected for genotyping in the replication stage. A meta-analysis integrating the discovery and replication stage results (n = 19,515) was conducted. NVP-related variables were identified as categorical or continuous.ResultsGWAS analysis in the discovery phase revealed loci linked to NVP in two gene regions, 11q22.1 (rs77775955) and 19p13.11 (rs749451 and rs28568614). Loci in these two gene regions have also been shown to be associated with HG in a White European population, indicating the generalizability of the GWAS analyses conducted in this study. Of these, only rs749451 and rs28568614 at 19p13.11 reached the genome-wide suggestive level (p < 1.0 × 10− 5) in the replication stage; however, both loci were significant in the meta-analysis.ConclusionsNVP-related loci were identified in the Japanese population at 11q22.1 and 19p13.11, as reported in previous GWAS. This study contributes new evidence on the generalizability of previous GWAS on the association between genetic background and NVP.

Creating a Class Plan to Strengthen Marital Relationships During Pregnancy in Japan

BackgroundChild-rearing support programs in Japan have focused on supporting families (especially mothers) after their children are born. Maternal and child healthcare services during pregnancy mainly target mothers and their children. Although programs for fathers (such as parent–teacher classes) are gradually being implemented, support for fathers will become more important in the future.ObjectivesWe reviewed studies conducted in Japan on support for fathers during pregnancy (especially those focusing on the content of classes) and examined the content and methods of classroom approaches for fathers. Then, the content of the exercises related to the Becoming Parents Program was examined. The BPP, which was developed in Washington D.C., is an experiential program that focuses on strengthening the couple’s partnership, particularly in the transition to fatherhood. Focusing on the father–partner relationship itself, this study aimed to examine the kind of support methods and content would be best for planning a class during pregnancy in Japan and developing a class plan.MethodsWe searched the nursing literature for studies on classes or classes for expectant fathers that included educational content on fathers during pregnancy. Thirteen domestic studies were included in the literature review. Next, 16 exercises from the BPP book were analyzed for content.ResultsExpectant fathers sought specific information on support for their spouses. The 16 exercises in the BPP book entitled “The Speaker-Listener Technique and Problem Solving” were found to be fundamental skills. A proposed class for expectant parents incorporating the basics of BPP was designed.ConclusionsAlthough there are differences in social backgrounds, cultures, and family backgrounds between Japan and other countries, we believe that the basic skills can be commonly used. In Japan, it is necessary to consider holding classes for parents to strengthen their marital relationship during pregnancy.

Complementary and alternative medicine use by pregnant women in Japan: a pilot survey

BackgroundComplementary and alternative medicine (CAM) are popular among women, and are used during their pregnancy in Japan. This study aimed to survey the prevalence of CAM use by healthy pregnant women as a health-care prescribed therapy or self-care and to investigate the factors associated with CAM use in Japan.MethodsIn this cross-sectional study, pregnant women after 34 weeks of gestation were asked to respond to a questionnaire at the clinic or online. The questionnaire comprised questions on the participants’ characteristics and their use of CAM for therapy and self-care. Descriptive statistics were calculated in the analyses, and bivariate and multivariate logistic analyses were performed to evaluate the associations between factors and CAM use.ResultsA total of 394 women responded from three hospitals, two clinics, and two midwifery birth centers. CAM was received as treatment by practitioners during pregnancy by 75 women (19.0%). The following therapies were used: traditional Chinese medicine (7.9%), chiropractic (6.9%), moxibustion (6.4%), and acupuncture (5.3%). One or more types of therapy were used as self-care by 348 women (88.3%). Highly used CAM for self-care were: folic acid supplementation (75.4%), other supplements (51.5%), herbs (20.8%), and yoga (19.0%). Multiple logistic regression analyses revealed that the factors associated with CAM use as a therapy were midwifery birth centers for planned childbirth settings (adjusted odds ratio [AOR] 3.64, 95% confidence interval [CI] [1.69–7.83]) and pregnancy complications diagnosed (AOR 2.46, 95%CI [1.38–4.39]). The factors associated with CAM use for self-care were age 30–39 years (AOR 4.48, 95%CI [2.14–9.73]) and over 40 years (AOR 3.92, 95%CI [1.10–13.91]), junior college education or above (AOR 2.30, 95%CI [1.18–4.51]), and primiparas (AOR 3.82, 95%CI [1.86–7.86]). The most common source of information was the “Internet” (43.8%).ConclusionsApproximately 20% of Japanese pregnant women received CAM as therapy by practitioners, and the related factors were: tended to have baby at midwifery birth center and pregnancy complications. Almost 90% of respondents used CAM as self-care and the related factors were: older, had a higher educational level and tended to be primiparas. They used the Internet as their main source of information about CAM. Health care providers need to provide evidenced-based information on CAM and to help decision making to ensure safe and effective CAM utilization by pregnant women.

Support Needs for Anxiety among Pregnant Women in Japan: A Qualitative Pilot Study

Support needs for pregnancy-related anxiety among low-risk pregnant women remain unclear. This study aimed to clarify the kinds of support for anxiety that women seek during pregnancy in Japan. Data were collected in a semi-structured focus group interview involving five pregnant women who were not in specific risk groups, recruited from three facilities in Tokyo. We generated themes using inductive thematic analysis. This paper adhered to the consolidated criteria for reporting qualitative research. From the data on support needs for anxiety during pregnancy, three themes were derived: (1) seeking tailored professional support; (2) seeking continuous support within informal relationships; and (3) seeking others’ success stories in the same situation. These three types of support gave participants a sense of reassurance or raised concern, depending on the situation. We proposed a model comprising the three derived themes using social cognitive theory. We discussed how these three types of support influenced pregnant women’s self-efficacy, which is the core concept of the social cognitive theory. Our findings may help to plan theory-based research and effective interventions to provide support for women’s anxiety during pregnancy using a population approach. Our results also demonstrated the importance of collaboration with pregnant women in developing further research and interventions.

ANTIMICROBIAL ALLERGY ASSESSMENT DURING PREGNANCY FOR APPROPRIATE ANTIMICROBIAL USE AT DELIVERY

Avoidance of suspect drugs based solely on a history of drug allergy is detrimental to disease outcomes. Many antimicrobial allergy labels are not usually true allergy. Some studies have demonstrated that antimicrobial allergy assessments can be safely performed on pregnant women. The purpose of this study was to examine the usefulness of antibiotic allergy assessment during pregnancy in Japan. We reviewed pregnant women who reported antimicrobial allergies and were referred to the allergy center. Allergists conducted an interview and skin test and selected antibiotics that could be used at delivery. Twenty-four pregnant women were referred to as having antimicrobial allergies. Most of the suspected antimicrobials were cephalosporin (13 cases, 52%) and penicillin (9 cases, 36%). Five women were ruled out only by our interviews. Of the remaining 20 cases, 10 were immediate type, 6 were non-immediate type, and 4 were unknown. All 21 pregnant women who needed antimicrobials were able to use the first-line drugs (β-lactam antimicrobials) at the time of delivery. No surgical site infections or allergic reactions were observed. Pregnant women with antimicrobial allergy labels could be evaluated by antimicrobial allergy assessment during pregnancy, and first-line antimicrobials were safely and properly used at delivery.

Tryptophan intake is related to a lower prevalence of depressive symptoms during pregnancy in Japan: baseline data from the Kyushu Okinawa Maternal and Child Health Study.

Tryptophan is an essential amino acid wholly derived from diet. While the majority of tryptophan is degraded through the kynurenine pathway into neuroactive metabolites like quinolinic acid and kynurenic acid, a small proportion of ingested tryptophan is metabolized into the neurotransmitter serotonin. The current cross-sectional study in Japan examined the association between tryptophan intake and depressive symptoms during pregnancy. Study subjects were 1744 pregnant women. Dietary intake during the preceding month was assessed using a self-administered diet history questionnaire. Depressive symptoms were defined as a score ≥ 16 on the Center for Epidemiologic Studies Depression Scale. Adjustment was made for age, gestation, region of residence, number of children, family structure, history of depression, family history of depression, smoking, secondhand smoke exposure at home and at work, employment, household income, education, body mass index, and intake of saturated fatty acids, eicosapentaenoic acid plus docosahexaenoic acid, calcium, vitamin D, and isoflavones. The prevalence of depressive symptoms during pregnancy was 19.2%. After adjustment for confounding factors, higher tryptophan intake was independently inversely associated with the prevalence of depressive symptoms during pregnancy: the adjusted prevalence ratios (95% confidence intervals) for depressive symptoms during pregnancy in the first, second, third, and fourth quartiles of tryptophan intake were 1 (reference), 0.99 (0.76-1.28), 0.94 (0.71-1.25), and 0.64 (0.44-0.93), respectively (p for trend = 0.04). Higher estimated tryptophan intake was cross-sectionally independently associated with a lower prevalence of depressive symptoms during pregnancy in Japanese women.

Diagnosis and management of fetal growth restriction and uteroplacental dysfunction in hypertensive disorders of pregnancy in Japan: a nationwide survey by the Japan Society for the Study of Hypertension in Pregnancy (JSSHP)

Diagnosis and management of fetal growth restriction and uteroplacental dysfunction in hypertensive disorders of pregnancy in Japan: a nationwide survey by the Japan Society for the Study of Hypertension in Pregnancy (JSSHP)

The association between gestational weight gain and perinatal outcomes among underweight women with twin pregnancy in Japan.

To clarify the association between gestational weight gain (GWG) and pregnancy outcomes in underweight women with twin pregnancies in Japan. This retrospective study derived data from the Japan Society of Obstetrics and Gynecology perinatal database between 2007 and 2015. We included 5049 underweight (pre-pregnancy body mass index [BMI] <18.5kg/m2 ) and 20 812 (BMI ≥18.5 and <25kg/m2 ) normal-weight, twin-pregnant women. Weekly GWG was stratified into 10 categories. Logistic regression was used to assess the effects of GWG on pregnancy. The primary outcomes evaluated were small-for-gestational age (SGA), preterm birth, preeclampsia, and cesarean delivery. In underweight group, high GWG was associated with significant risk reductions in both twins being SGA, at least one twin being SGA, very preterm birth, and extreme preterm birth, while a risk increase was observed in preeclampsia. Compared to women with GWG of 0.25-0.30kg/week, the risk of preeclampsia was significantly higher in women with GWG >0.35kg/week. No association was observed between GWG and cesarean delivery. These associations were similar in the normal-weight group. Underweight women with twin pregnancies showed an inverse association between GWG and SGA or preterm birth. The risk of preeclampsia was higher in women who gained >0.35kg/week.

Analysis of triptan use during pregnancy in Japan: A case series.

To evaluate the safety of triptan use during pregnancy in a Japanese population, we descriptively analyzed the data on pregnancy and fetal outcomes from 128 pregnant women using triptans for migraine treatment at two Japanese facilities that provided counseling on drug exposure in pregnancy between 2001 and 2017. The risks of miscarriage, low birth weight, and preterm birth were similar to those reported in the demographic statistics in Japan. The incidence proportion of malformation was also within the baseline risk range. Accumulated data suggest that exposure to triptans during pregnancy does not clearly increase the risk of negative pregnancy and fetal outcomes. This finding can help reduce anxiety in pregnant women with migraines who are taking triptans.

Lymphoma during pregnancy in Japan: a multicenter retrospective cohort study.

This study was conducted to characterize lymphoma occurring during pregnancy and to investigate the outcomes of the patients and the fetuses. Clinical data were gathered retrospectively from 29 patients at 13 participating institutions, and data from 28 eligible patients were analyzed. Six (21%) patients had Hodgkin lymphoma (HL) and 22 (79%) patients had non-Hodgkin lymphoma (NHL). All patients with HL presented with lymphadenopathy, but 15 (68%) of the 22 patients with NHL presented with extranodal sites only. At the median follow-up period of 1325 (range 6-4461) days, the 5-year overall survival rate was 63% for patients with NHL and 100% for patients with HL. Three of the 13 patients who received chemotherapy during pregnancy (23%) developed Pneumocystis jiroveci pneumonia (PCP). There was 1 intrauterine fetal death, 1 spontaneous abortion in the first trimester, and 15 (54%) preterm births. This study showed a higher proportion of NHL than HL during pregnancy in Japan, which was inconsistent with the proportions observed in Western countries. The high incidence of maternal PCP and preterm birth suggested the need for improvements in our management of lymphoma during pregnancy.

Antimicrobial Resistance for Chlamydia Trachomatis Genital Infection during Pregnancy in Japan.

The current study examined the antimicrobial resistance of Chlamydia trachomatis (CT) genital infection during pregnancy in Japan. We requested 2,146 obstetrical facilities that are members of Japan Association of Obstetricians and Gynecologists to provide information of CT screening tests and antimicrobial resistance in pregnant women between April 2020 and March 2021. The prevalence of CT genital infection in Japan was 2.1%. The antimicrobial resistance was recognized in 2.0 and 2.4% of the cases using azithromycin and clarithromycin, respectively. There were no significant differences in the antimicrobial resistance rate between the 2 analogues (P = 0.28). In Japan, azithromycin and clarithromycin have effectively treated genital CT infections during pregnancy.

Trends in the Prevalence and Progression of Diabetic Retinopathy Associated with Hyperglycemic Disorders during Pregnancy in Japan.

The aim of this study was to determine the prevalence and progression of diabetic retinopathy (DR) with hyperglycemic disorders during pregnancy (HDPs) in Japan between 2013 and 2018 using two cohorts. The patients with HDPs were classified as those with pre-existing DM (pexD), gestational DM (GDM), and overt DM (ODM). Cohort 1 was obtained from the health claims database whose diseases were classified by the International Classification of Diseases-10. Cohort 2 was derived from a retrospective, multicenter analysis of the medical records of 225 patients from 10 ophthalmological institutions. In Cohort 1, there were 5268 patients with an HDP prevalence of 8.4%. Among them, 73 of 1139 patients had pexD (6.4%) and 61 of 4129 patients with GDM (1.5%) had DR; the overall prevalence of DR was 2.5%. In Cohort 2, 36 of 225 patients (16.0%) had DR, and 149 patients were followed at the early and late stages of pregnancy. Moreover, 10 of the 102 patients with pexD (9.8%) and two of five patients with ODM (40.0%) had a progression of DR. In conclusion, the prevalence and progression of DR in patients with pexD is lower than previously reported. More attention should be given to pexD and ODM.

Association of Lifestyle Changes Due to the COVID-19 Pandemic with Nutrient Intake and Physical Activity Levels during Pregnancy in Japan.

The coronavirus disease 2019 (COVID-19) pandemic has introduced changes in our lifestyles, such as refraining from unnecessary outings. This study aimed to clarify the association of lifestyle changes due to the COVID-19 pandemic with nutrient intake and physical activity levels during pregnancy in Japan. A cross-sectional study involving 168 healthy pregnant Japanese women was conducted in 2020. Nutrient intake and physical activity levels were assessed using validated self-administered questionnaires. Participants who reported experiencing changes in both dietary habits and physical activity due to the COVID-19 pandemic were classified as the lifestyle-affected group. Analysis of covariance was used. Among primiparas, intake of the following nutrients was significantly higher in the lifestyle-affected group (n = 14) than in the unaffected group (n = 77): protein, potassium, calcium, magnesium, and vitamin B6. Among multiparas, the intake of dietary fiber and β-carotene were significantly lower in the lifestyle-affected group (n = 13) than in the unaffected group (n = 64). No significant differences in physical activity levels were observed in accordance with the lifestyle changes. These findings suggest that lifestyle changes due to the COVID-19 pandemic have positive effects on nutrient intake during pregnancy in primiparas, whereas in multiparas, these changes have negative effects.

P-075. A survey on the diagnosis and management of uteroplacental dysfunction in hypertensive disorders of pregnancy in Japan

Seed vigor is an important factor determining the viability of seeds, which is related to many seed-internal components. The vitality of seeds can be identified by assessing the internal information of seeds. In this study, seeds of the sweet corn variety “TuxpenoSweet” were used. Visible and near-infrared spectral ranges were assessed to explore the viability of seeds under different processing methods, and variable selection algorithms were used to optimize models. Heat damaged and artificially aged seeds were compared with normal seeds, and two spectrometers with different band widths were used to collect the spectra of seeds. Seed discrimination models were established based on full-wavelength data and effective variables were selected through competitive adaptive reweighted sampling. The discrimination accuracy of models based on both spectrometers exceeded 95%, and the discrimination accuracy of the model based on effective variables was higher than or consistent with that of the model established with full wavelengths. The experimental results corroborate the feasibility of using spectral ranges between 500–1100 nm or 1000–1850 nm to discriminate seed vigor. The model based on the effective variables extracted by competitive adaptive reweighted sampling reduces the amount of calculated data and either optimizes or maintains the accuracy of the discrimination rate. Effective variables, extracted from the spectrometer with the spectral range of 500–1100 nm, effectively reduced the test cost and the amount of data while ensuring high seed vigor discrimination accuracy.