How accurate are ultrasound dating scans. how accurate is a dating scan?.



How accurate are ultrasound dating scans

How accurate are ultrasound dating scans

Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. Methods This cross-sectional study included consecutive pregnant women receiving antenatal care at two tertiary health institutions in Enugu, Nigeria, from January 1, to March 31, Results The mean age of the women was Most ultrasound scans The majority of the respondents Conclusion The worrisome confidence in ultrasound scan dating is a challenge to the prevention of prolonged pregnancy and its complications in our environment.

Antenatal health education should discourage self-referral for ultrasound scan dating and emphasize its limitations in late pregnancy as well as the perinatal effects of prolonged pregnancy. Both are important for optimal prenatal, intrapartum, and postnatal care.

For instance, reliable information about gestational age and EDD is useful in assessment of fetal growth during the antenatal period. In clinical practice, the gestational age and EDD are often determined using the LMP, except when the discrepancy between the LMP-derived gestational age or EDD and that of early pregnancy ultrasound scan exceeds 1 week; in this situation, the ultrasound scan estimates are more reliable and should be used.

Further, the rate of post-term pregnancy has been shown to decrease when early ultrasound scan is used in estimating the gestational age and EDD.

The uncontrolled proliferation of ultrasound in Nigeria has further heightened the conflict between these two estimates of delivery date because pregnant women are increasingly having access to ultrasound scanning manned by various cadres of health workers, without information on its known limitations. This scenario is a big challenge in terms of prevention of prolonged pregnancy in our environment where women register late for antenatal care 9 and rarely have reliable early ultrasound scan results.

A scenario is often created where the attending medical practitioner feels the pregnancy is prolonged based on a certain LMP-derived EDD while the client holds a different view based on her ultrasound scan-derived EDD, and therefore refuses to accept induction of labor despite counseling.

The aim of this study was to determine the perception and acceptability of menstrual dating EDD derived from LMP for timing of labor induction for postdatism by pregnant women who have a late pregnancy ultrasound scan. Materials and methods Study area Enugu State is one of the five states in the southeast geopolitical zone of Nigeria, and its capital city is Enugu.

It has an average annual temperature of The state covers a land area of approximately 8, The Enugu State University Teaching Hospital, Parklane, is a state-owned teaching hospital located in the center of the Enugu metropolis.

Both centers provide antenatal and postnatal care services to pregnant women in Enugu State. The commonest indication for induction of labor in the two hospitals and in our environment is prolonged pregnancy. Every singleton pregnant woman due for a routine delivery planning discussion at a gestational age of 36 weeks and beyond was eligible for the study. Exclusion criteria included uncertainty of date, presence of contraindications to vaginal delivery, irregular menstrual cycle prepregnancy, use of hormonal contraceptives prior to pregnancy, or bleeding during pregnancy.

After individual counseling of eligible participants, pretested structured questionnaires were administered to consecutive consenting women by trained medical interns.

Ethical clearance for the study was obtained from the institutional review board of the University of Nigeria Teaching Hospital, Enugu. Data collected included the sociodemographic characteristics of the respondents age, marital status, tribe, level of education, occupation, parity , opinions and preferences regarding LMP and ultrasound scan dates, and their attitudes toward postdatism and induction of labor in relation to estimated dates. The primary outcome measure was willingness to accept induction of labor at an LMP-derived gestational age of 40 weeks plus 10 days when late pregnancy ultrasound scan-derived gestational age was less than 40 weeks plus 10 days.

The first trimester was defined as a gestational age of 1—13 weeks, the second trimester as 14—27 weeks, and the third trimester as 28—42 weeks. Further, the early second trimester was defined as a gestational age of 15—22 weeks and the late second trimester as 23—27 weeks.

Frequency tables were generated for relevant variables. A P-value of less than 0. Results A total of questionnaires were administered, but only were completed correctly, giving a response rate of The mean age of the respondents was Most of the women Four hundred and thirty-one respondents The majority of respondents were multiparous Further details of the sociodemographic characteristics of the respondents are shown in Table 1.

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How Ultrasound Works Animation - Ultrasound Scan During Pregnancy Video - USG Medical Imaging



How accurate are ultrasound dating scans

Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. Methods This cross-sectional study included consecutive pregnant women receiving antenatal care at two tertiary health institutions in Enugu, Nigeria, from January 1, to March 31, Results The mean age of the women was Most ultrasound scans The majority of the respondents Conclusion The worrisome confidence in ultrasound scan dating is a challenge to the prevention of prolonged pregnancy and its complications in our environment.

Antenatal health education should discourage self-referral for ultrasound scan dating and emphasize its limitations in late pregnancy as well as the perinatal effects of prolonged pregnancy. Both are important for optimal prenatal, intrapartum, and postnatal care.

For instance, reliable information about gestational age and EDD is useful in assessment of fetal growth during the antenatal period. In clinical practice, the gestational age and EDD are often determined using the LMP, except when the discrepancy between the LMP-derived gestational age or EDD and that of early pregnancy ultrasound scan exceeds 1 week; in this situation, the ultrasound scan estimates are more reliable and should be used.

Further, the rate of post-term pregnancy has been shown to decrease when early ultrasound scan is used in estimating the gestational age and EDD. The uncontrolled proliferation of ultrasound in Nigeria has further heightened the conflict between these two estimates of delivery date because pregnant women are increasingly having access to ultrasound scanning manned by various cadres of health workers, without information on its known limitations. This scenario is a big challenge in terms of prevention of prolonged pregnancy in our environment where women register late for antenatal care 9 and rarely have reliable early ultrasound scan results.

A scenario is often created where the attending medical practitioner feels the pregnancy is prolonged based on a certain LMP-derived EDD while the client holds a different view based on her ultrasound scan-derived EDD, and therefore refuses to accept induction of labor despite counseling.

The aim of this study was to determine the perception and acceptability of menstrual dating EDD derived from LMP for timing of labor induction for postdatism by pregnant women who have a late pregnancy ultrasound scan. Materials and methods Study area Enugu State is one of the five states in the southeast geopolitical zone of Nigeria, and its capital city is Enugu. It has an average annual temperature of The state covers a land area of approximately 8, The Enugu State University Teaching Hospital, Parklane, is a state-owned teaching hospital located in the center of the Enugu metropolis.

Both centers provide antenatal and postnatal care services to pregnant women in Enugu State. The commonest indication for induction of labor in the two hospitals and in our environment is prolonged pregnancy.

Every singleton pregnant woman due for a routine delivery planning discussion at a gestational age of 36 weeks and beyond was eligible for the study. Exclusion criteria included uncertainty of date, presence of contraindications to vaginal delivery, irregular menstrual cycle prepregnancy, use of hormonal contraceptives prior to pregnancy, or bleeding during pregnancy. After individual counseling of eligible participants, pretested structured questionnaires were administered to consecutive consenting women by trained medical interns.

Ethical clearance for the study was obtained from the institutional review board of the University of Nigeria Teaching Hospital, Enugu. Data collected included the sociodemographic characteristics of the respondents age, marital status, tribe, level of education, occupation, parity , opinions and preferences regarding LMP and ultrasound scan dates, and their attitudes toward postdatism and induction of labor in relation to estimated dates.

The primary outcome measure was willingness to accept induction of labor at an LMP-derived gestational age of 40 weeks plus 10 days when late pregnancy ultrasound scan-derived gestational age was less than 40 weeks plus 10 days. The first trimester was defined as a gestational age of 1—13 weeks, the second trimester as 14—27 weeks, and the third trimester as 28—42 weeks. Further, the early second trimester was defined as a gestational age of 15—22 weeks and the late second trimester as 23—27 weeks.

Frequency tables were generated for relevant variables. A P-value of less than 0. Results A total of questionnaires were administered, but only were completed correctly, giving a response rate of The mean age of the respondents was Most of the women Four hundred and thirty-one respondents The majority of respondents were multiparous Further details of the sociodemographic characteristics of the respondents are shown in Table 1.

How accurate are ultrasound dating scans

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