scholarly journals Chinese Fetal Biometry: Establishment of a Formula for Calculating Gestational Age based on Crown–Rump Length Measurements

2021 ◽  
Author(s):  
Yixiu Zhang ◽  
Hua Meng ◽  
Yuxin Jiang ◽  
Zhonghui Xu ◽  
Yunshu Ouyang ◽  
...  
Keyword(s):  
Menstrual Cycle ◽  
Gestational Age ◽  
Prediction Error ◽  
Polynomial Regression ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Crown Rump Length ◽  
Fetal Biometry ◽  
Fractional Polynomial ◽  
The Mean

Abstract Background: To develop an ultrasonographic dating formula for predicting gestational age (GA) based on fetal crown–rump length (CRL) in a Chinese population, evaluate its systematic prediction error and compare it with existing formulae.Methods: This was a prospective cross-sectional study of spontaneously conceived singleton pregnancies among women with a regular menstrual cycle in the preceding year. Ultrasound examinations were performed at 11–14 weeks according to the date of the last menstrual cycle. The CRL was measured three times for each fetus, and the mean was used to derive the best-fit fractional polynomial regression model for estimation of GA in relation to CRL. For each fetus, the GA was compared with the GA calculated using six established dating formulae based on CRL measurements. The means of the differences between estimated and menstrual age were calculated for each formula. All the women were followed up routinely until the birth of the fetus. Results: Of the 4710 subjects recruited, the mean and standard deviation values of CRL changed linearly with GA. The corresponding regression equation and its correlation coefficient (R2) was GA = 59.361513 + 0.461425 ´ CRL (R2 = 0.8028). The mean difference between estimated and menstrual age was 0.22 days (95% confidence interval 0.05–0.21), lower than that of the six existing CRL dating formulae.Conclusions: We have derived a CRL-based dating formula suitable for naturally conceived pregnancies for GA between 11+0 and 13+6 weeks. The formula has no systematic prediction error, comparing favorably with the existing published dating formulae.

Sonographic Assessment of Amniotic Fluid Volume using Single Deepest Pocket (SDP) among Igbo Women with Uncomplicated Singleton Pregnancies.

2019 ◽  
Vol 2 (1) ◽  
pp. 1-18
Author(s):  
Chijioke Okeudo ◽  
B.U. Ezem
Keyword(s):  
Amniotic Fluid ◽  
Gestational Age ◽  
Cross Sectional Study ◽  
Fluid Volume ◽  
Singleton Pregnancy ◽  
Cross Sectional ◽  
South Eastern ◽  
Amniotic Fluid Volume ◽  
The Mean ◽  
Singleton Pregnancies

Background: The amniotic fluid is fundamental for proper fetal development and growth. Ultrasound visualization of the amniotic fluid permits both subjective and objective estimates of the amniotic fluid. Objective: The objective of this study was to determine the reference values of normal single deepest pocket (SDP) – upper and lower limits, mean SDP and variation of the SDP with gestational age among Igbo women of South-Eastern Nigeria extraction carrying uncomplicated singleton pregnancy. Methodology: This was a prospective cross sectional study involving 400 women carrying uncomplicated singleton pregnancies and who were sure of the date of the first day of their last menstrual period. The single deepest pocket / maximum vertical pool were determined once at presentation at the hospital.. The study was conducted from January 1st to December 31st 2015. The second author carried out all the scanning. The SDP was obtained. Results: The womens’ mean and median ages were the same at 28 years. The gestational age range of the pregnancies was 14-41 weeks. The mean SDP was 5.8cm, while the 5th and 95th percentiles were 3.3cm and 8.5cm respectively. There was no difference in the mean SDP in both term and preterm. There was irregular but continuous rise of mean SDP to a peak of 6.8cm at gestational age of 39 weeks. In conclusion, the participants had a mean SDP of 5.8cm. There was also a positive correlation between SDP and Gestational age. We therefore recommend a longitudinal study to assess perinatal outcome and abnormal amniotic fluid volume among Igbo women of South-Eastern Nigeria. Key words: Single Deepest Pocket, Uncomplicated Singleton Pregnancy, Igbo Women.

How Much Cerebrospinal Fluid Should We Remove Prior to Measuring a Closing Pressure?

2016 ◽  
Vol 32 (4) ◽  
pp. 356-359 ◽  
Author(s):  
Son H. McLaren ◽  
Michael C. Monuteaux ◽  
Atima C. Delaney ◽  
Assaf Landschaft ◽  
Amir A. Kimia
Keyword(s):  
Cerebrospinal Fluid ◽  
Polynomial Regression ◽  
Pressure Change ◽  
Cross Sectional Study ◽  
Inclusion Criteria ◽  
Opening Pressure ◽  
Cross Sectional ◽  
Csf Pressure ◽  
Fractional Polynomial ◽  
Closing Pressure

Objective: The objective of this study was to identify a relationship between cerebrospinal fluid (CSF) volume removal and change in CSF pressure in children with suspected idiopathic intracranial hypertension (IIH). Methods: We performed a cross-sectional study of children 22 years and younger who underwent a lumbar puncture (LP) and had a documented opening pressure, closing pressure, and volume removed. Relationship between volume removal and pressure change was determined using a fractional polynomial regression procedure. Results: In the 297 patients who met the inclusion criteria, CSF pressure decreased by 1 cm H2O for every 0.91 mL of CSF removed if the maximum change in pressure was less than 15 cm H2O ( R2 = 0.38). Conclusion: A linear relationship exists between the volume of CSF removed and the amount of pressure relieved when the desired pressure change is less than 15 cm H2O.

Fetal kidney length as a parameter for determination of gestational age from 20th week to term in healthy women with uncomplicated pregnancy

2017 ◽  
Vol 5 (5) ◽  
pp. 1869 ◽  
Author(s):  
Monalisa Peter ◽  
Ajit Kumar Nayak ◽  
Prajna Paramita Giri ◽  
Manju Kumari Jain
Keyword(s):  
Gestational Age ◽  
Abdominal Circumference ◽  
Fetal Kidney ◽  
Cross Sectional ◽  
Crown Rump Length ◽  
Fetal Biometry ◽  
Healthy Women ◽  
Uncomplicated Pregnancy ◽  
Kidney Length ◽  
Biometric Indices

Background: Accurate assessment of gestational age is pivotal to give quality maternity care. Ultrasonographic fetal biometry is the most widespread method used to establish GA. Sonographic biometric parameters commonly used are Crown rump Length (CRL), Biparietal diameter (BPD), Head circumference (HC), Abdominal circumference (AC) and Femur length (FL). Fetal Kidney Length (FKL) is one of nontraditional parameter and more accurate method of GA estimation than BPD, FL, HC and AC after 24th week of gestation. This study evaluates role of FKL in estimation of GA and compared its accuracy with other established biometric indices.  Methods: Present study is a cross sectional study and includes healthy women who were certain of their LMP with prior regular menstrual cycles with uncomplicated pregnancy between 20 weeks of gestation to term. Maximum length of anyone single fetal kidney is measured from upper pole to lower pole at least thrice and mean of the measurements was taken. The data has been analyzed in SPSS-21 version and Microsoft word, excel have been used to generate graphs, tables etc.Results: Linear regression equation showed kidney length could predict gestational age with an accuracy ±9.048 days and predictability when combined with other biometric indices was ±8.299 days.Conclusions: The study shows good correlation between gestational age derived from FKL and gestational age from established biometric indices like BPD, HC, AC, and FL.FKL can be combined with the other four biometric indices to give a fair estimation of gestational age.

scholarly journals A cross-sectional study on the correlation between postnatal foot length and various other anthropometric parameters along with the gestational age

2020 ◽  
Vol 7 (8) ◽  
pp. 414-419
Author(s):  
Dr. Abhinaya Arun Raj ◽  
◽  
Dr. K. Maheswari ◽  
Keyword(s):  
Birth Weight ◽  
Gestational Age ◽  
Head Circumference ◽  
Cross Sectional Study ◽  
Chest Circumference ◽  
Sectional Study ◽  
Cross Sectional ◽  
Foot Length ◽  
The Mean ◽  
R Value

Introduction: This study was done to assess the utility of foot length in determining theanthropometric parameters of a newborn in a tertiary care teaching hospital. Materials andMethods: This cross-sectional study among 270 newborns were done at Sri Venkateswaraa medicalcollege hospital and research centre, from Nov 2018 to May 2020. All the healthy live newbornswere taken into the study and newborns with congenital lower limb anomalies were excluded.Results: The mean birth weight of the neonate 2.948+0.344 kg which ranged from 2.050 kg to3.750kg. The mean foot length, head circumference and chest circumference of the foot length was8.113+0.468 cm, 48.989+1.093 cm, 34.437+0.659 cm and 32.372+0.734 cm respectively. The footlength had a maximum correlation with birth weight (r-value=0.905) followed by gestational age (r-value=0.809), length (r-value=0.786), head circumference (r-value=0.719) and chest circumference(r-value=0.603). Conclusion: Foot length had a significant correlation with birth weight andgestational age of the neonates. Foot length also correlated significantly with other anthropometricvariables like length, head circumference and chest circumference.

scholarly journals TO COMPARE ESTIMATION OF GESTATIONAL AGE BY FOETAL TRANSCEREBELLAR DIAMETER WITH BIPARIETAL DIAMETER`, FEMUR LENGTH, ABDOMINAL CIRCUMFERENCE, HEAD CIRCUMFERENCE AT DEPARTMENT OF OBSTETRICS AND GYNAECOLOGY AT SMS MEDICAL COLLEGE, JAIPUR

2020 ◽  
Vol 4 (6) ◽  
Author(s):  
Samta Solanki ◽  
Anusha S ◽  
B S Meena
Keyword(s):  
Gestational Age ◽  
Cross Sectional Study ◽  
Abdominal Circumference ◽  
Third Trimester ◽  
Cross Sectional ◽  
Femur Length ◽  
Medical College ◽  
Obstetrics And Gynaecology ◽  
Biparietal Diameter ◽  
The Mean

Background: Ultrasonographic assessment of gestational age by using different foetal parameter such as BPD, FL, AC are highly reliable in first and second trimester in pregnancy. In third trimester reliability of any single parameter has limitations. Methods: This was a hospital based comparative cross-sectional study done in the Department of Obstetrics and Gynaecology, S.M.S. Medical College and attached hospitals, Jaipur, Rajasthan. The period of study was from June 2018 to October 2019. Results: The mean TCD at 15 weeks and 40 weeks was 15.00 ± 0.00mm and 53.33±1.155mm respectively. The mean BPD at 16 weeks and 40 weeks was 33.50±0.70mm and 93±1.528mm respectively. The mean HC at 15 weeks and 40 weeks was 111.00±1,41mm and 340±2.00mm respectively. The mean FL at 15 weeks and 40 weeks was 18.50±0.70mm and 77.67±1.528mm respectively. The mean AC at 15 weeks and 40 weeks was 99.00±1.41mm and 365.33±8.32mm respectively. Conclusion:  We conclude that foetal transcerebellar diameter can thus be used as an alternative foetal parameter to assess gestational age and can be used in cases of wrong dates or when other routine parameters are not conclusive or did not accurately predict gestational age for e.g. in cases of hydrocephalus, brachycephaly, dolicocephaly, intrauterine growth restriction, achondroplasia or short limb dwarfism. Keywords: Gestational age, Linear regression, BPD

scholarly journals Normal value of pulsatility index of umbilical artery in second and third trimester of pregnancy

2013 ◽  
Vol 39 (1) ◽  
pp. 42-44 ◽  
Author(s):  
MA Ferdous ◽  
MM Sharif ◽  
AS Mohiuddin ◽  
F Shegufta
Keyword(s):  
Gestational Age ◽  
Pulsatility Index ◽  
Umbilical Artery ◽  
Negative Relationship ◽  
Cross Sectional Study ◽  
Third Trimester ◽  
Cross Sectional ◽  
Mean Values ◽  
The Mean ◽  
Level Of Significance

This cross sectional study was carried out on 60 pregnant Bangladeshi women in the department of Radiology and Imaging, BIRDEM for measurement of Pulsatility Index (PI) of umbilical artery of their fetuses by duplex colour Doppler sonography during 2nd and 3rd trimester of pregnancies. Considering total 2nd and 3rd trimesters the mean PI value of umbilical artery was 1.24 (SD±0.27). While considering the gestational in separate trimesters, study showed that the value of PI in 2nd trimester was 1.33 (SD±0.29) and in 3rd trimester PI was 1.18 (SD±0.25). Paired t test shows there was a highly significant (t=35.79, df=59, Level of significance=0.001) difference between mean values of PI in different gestational ages. It was observed that there was gradual decrease of PI value with increase of gestational age (r= -0.207) but this decrease of PI was not statistically significant (p=0.113). Regression analysis between dependent PI value and independent gestational age showed linear negative relationship but this was not statistically significant (p=0.11). This study revealed that the Pulsatility index of umbilical artery was decreased with increase of gestational age from 2nd to 3rd trimester. DOI: http://dx.doi.org/10.3329/bmrcb.v39i1.15809 Bangladesh Med Res Counc Bull 2013; 39: 42-44

Amniocentesis Complications in Yazd Baghaeipour Polyclinic: A Cross-Sectional Study

2020 ◽  
Author(s):  
Nasim Shirgholami ◽  
Fatemeh Abdi ◽  
Mahta Mazaheri ◽  
Razieh Sadat Tabatabaee
Keyword(s):  
Gestational Age ◽  
Fetal Death ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Second Stage ◽  
History Of ◽  
The Mean ◽  
Pass Through ◽  
Type Of Delivery

Background: Amniocentesis, like other invasive methods, has complications such as abortion, premature rupture - second pregnancy and at 29 weeks of membranes, infection, bleeding, etc. Here, we aimed to study the complications of amniocentesis in pregnant women. Methods: This descriptive cross-sectional study was included 409 women with positive first and second stage screening or required amniocentesis referred to Baghaeipour Clinic in 2017. Data was collected by a pre-prepared questionnaire. Results: The mean age of the patients and gestational age was 33.49 ± 6.51 years and 17.39 ± 1.36  weeks, respectively. 132 patients (32.2%) had a history of abortion. Regarding the frequency of needle passage through the placenta, the results showed that in 369 people (90.2%) the needle did not pass through the placenta and in 40 people (9.8%). The needle has passed through the pair. Regarding the frequency distribution of amniocentesis complications, fetal death in (2.4%), bleeding in (2.2%) and PROM (1.7%) were observed in patients and no case of infection and abortion was observed. In terms of age, gestational age, gestational number, placental location, needle passage, aspirated fluid color, history of abortion and type of delivery, there were no significant differences. Conclusion: In this study the most common complication of amniocentesis was fetal death (2.4%), followed by bleeding and Spotting (2.2%), PROM (1.7%), infection and abortion, respectively.

scholarly journals Gestational age Estimated by Abdominal Circumference in Bangladesh

2013 ◽  
Vol 26 (2) ◽  
pp. 64-67 ◽  
Author(s):  
Sabrina Q Rashid
Keyword(s):  
Fetal Growth ◽  
Gestational Age ◽  
Age Estimation ◽  
Polynomial Regression ◽  
Cross Sectional Study ◽  
Abdominal Circumference ◽  
Cross Sectional ◽  
Standard Deviations ◽  
Bangladeshi Population ◽  
Gestational Age Estimation

Objective: Abdominal circumference measurement is an important parameter for determining  fetal growth. Fetal growth will be more accurately assessed if we use tables constructed on  our own population. A table of fetal gestational age estimation by abdominal circumference in  Bangladeshi population is prepared, so that a quick assessment of its growth can be made.Methods: This study was a prospective, cross-sectional study, conducted on well dated, singleton  pregnancies. A table and a graph were prepared after fitting Polynomial regression models.Results: Nomogram for gestational age estimation by abdominal circumference was prepared.  1223 patients were included in the study. Percentiles, mean and standard deviations were  derived from the raw data. Polynomial regression model was a good fit to the data. Standard  deviations increased with gestational age. In the early second trimester Bangladeshi and  western studies were similar but as pregnancy advanced there was variation between the two  races.Conclusion: This chart can be useful for Bangladeshi population, by helping in assessment of  fetal growth and gestational age by abdominal circumference, especially in the 3rd trimester.  This is so, because abdominal circumference is very sensitive to fetal nutritional status. DOI: http://dx.doi.org/10.3329/bjog.v26i2.13781 Bangladesh J Obstet Gynaecol, 2011; Vol. 26(2) : 64-67  

scholarly journals Association of Birth Parameters with Refractive Status in a Sample of Caucasian Children Aged 4–17 Years

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Berna Akova-Budak ◽  
Sertaç Argun Kıvanç ◽  
Osman Okan Olcaysü
Keyword(s):  
Birth Weight ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Age Groups ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Refractive Status ◽  
Ophthalmologic Examination ◽  
The Mean ◽  
Age Range

Purpose. To investigate the association of birth parameters with refractive status in different age groups of Caucasian children.Materials and Methods. This cross-sectional study included 564 eyes of 282 children aged 4 to 17 years. All children underwent complete ophthalmologic examination. The children were divided into three groups according to their refractive status (emmetropia,myopia, and hyperopia), ages (4–7, 8-9, 10–12, and 13–17), and appropriateness for gestational age, respectively.Results. The mean age of the children was9.2±2.8(age range 4–17 years). The mean spheric equivalent was+0.3±1.7(range: (−10.0)–(+10.0) diopters). The mean birth weight and gestational age were2681.1±930.8grams (750–5000 grams) and37.2±3.7weeks (25–42 weeks). According to multinominal logistic regression analysis, children with myopia were more likely to have higher birth weights than emmetropic children (OR: 1.0, 95% CI: 1.000–1.001, andP=0.028). The hypermetropes were found to be significantly small for gestational age between 13 and 17 years of age.Conclusion. Birth weight and appropriateness for gestational age as birth parameters may have an impact on development of all types of refractive errors. The hypermetropic children tended to be small for gestational age.

scholarly journals Urinary 8-Hydroxy-2′-deoxyguanosine (8-OHdG) Concentrations and Menstrual Cycle Characteristics in Female University Students

2018 ◽  
Vol 15 (12) ◽  
pp. 2616
Author(s):  
Shoko Konishi ◽  
Jun Yoshinaga ◽  
Yukiko Nishihama ◽  
Yu Onoda ◽  
Youichi Chisaki ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Menstrual Cycle ◽  
University Students ◽  
Polycystic Ovary ◽  
Cross Sectional Study ◽  
Menstrual Pain ◽  
Oxidative Stress Biomarkers ◽  
Cross Sectional ◽  
Menstrual Cycles ◽  
The Mean

Higher concentrations of oxidative stress biomarkers are found in women with polycystic ovary syndrome (PCOS) and endometriosis, conditions linked to irregular menstrual cycles and menstrual pain. The aim of the present study was to test whether women with higher oxidative stress are more likely to show irregular menstrual cycles and severe menstrual pain compared with women with lower oxidative stress. A cross-sectional study was conducted targeting female university students with a mean (SD) age of 20.5 (1.8) years (n = 188). Participants completed a questionnaire on reproductive characteristics and anthropometry and kept a menstrual cycle diary for 5 consecutive months. Urinary 8-hydroxy-2′-deoxyguanosine (8-OHdG), cotinine, and creatinine concentrations were measured once during the study period. The mean (SD) value of the urinary 8-OHdG concentration was 4.7 (2.0) μg/g of creatinine. A total of 1021 menstrual cycles were recorded. The participants were categorized as either having regular (68%) or irregular (18%) cycles or oligomenorrhea (13%) or polymenorrhea (1%). The urinary 8-OHdG concentration did not significantly differ across menstrual cycle regularity or pain categories. Even after adjusting for age, body mass index (BMI), and urinary cotinine concentrations, having irregular cycles or more severe menstrual pain was not associated with urinary 8-OHdG concentration.

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