Journal of Basic Research in Medical Sciences
مجله ی تحقیقات پایه در علوم پزشکی
Journal of Basic Research in Medical Sciences
Medical Sciences
http://jbrms.medilam.ac.ir
1
admin
2383-0506
2383-0972
doi
en
jalali
1394
10
1
gregorian
2016
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1
3
1
online
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fulltext
en
Comparison of the first trimester ultrasound and Parikh’s formula in determining the expected date of delivery: A prospective study
Midwifery
Midwifery
پژوهشي
Research
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<p style="text-align: justify"><strong>Introduction:</strong> The Parikh’s formula is a calculation method that considers menstrual cycle duration in women who have an unusual interval of menstruation cycle. Since the accurate estimation of gestational age affects pregnancy outcomes, the present study aimed to compare the first trimester ultrasound and Parikh’s formula in determining the Expected Date of Delivery (EDD).</p>
<p style="text-align: justify"><strong>Materials and methods:</strong> A prospective study was done among pregnant women referred to health centers of Borujerd, Iran, in 2014. All pregnant women with menstrual cycle less than 22 days and more than 35 days were included in the study and follow up to delivery time. Women with situations impacting the fetus development were excluded from the study. First trimester ultrasound was done at 7-13 week of last menstrual period and measured the Gestational Sac (GS) and Crown Rump Length (CRL). The gestational age was calculated by Parikh's formula. The association between the variables under study and gestational age were tested using chi-square test. The Pearson correlation coefficient was used to evaluate the correlation between the variables</p>
<p style="text-align: justify"><strong>Results:</strong> Overall, 300 women participated in the study. The gestational age calculated by the methods of the study, namely, the first trimester ultrasound and Parikh’s formula had no statistically significant difference (271.8 ± 0.99 and 275.2 ± 1.2 days in the first trimester ultrasound and Parikh's formula, respectively) (P=0. 625). The Pearson correlation coefficient showed a positive correlation between the GS (r = 0.645) and CRL (r = 0.768) measured by the first trimester ultrasound and gestational age calculated by the Parikh's formula.</p>
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<p dir="ltr" style="text-align: justify"><strong>Conclusion:</strong> The Parikh’s formula is recommended to use the calculation of the EDD in women who have an unusual interval of menstruation cycle and no access to ultrasound in the first trimester.</p>
Crown rump length, Gestational age, Gestational Sac, EDD
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25
http://jbrms.medilam.ac.ir/browse.php?a_code=A-10-63-8&slc_lang=en&sid=1
Parichehr
Khedri
direkvand-a@medilam.ac.ir
10031947532846002692
10031947532846002692
No
Department of Nursing and Midwifery, Branch of Borujerd, Islamic Azad University, Lorestan, Iran
Mohamad
Saatchi
direkvand-a@medilam.ac.ir
10031947532846002693
10031947532846002693
No
Department of Nursing and Midwifery, Branch of Borujerd, Islamic Azad University, Lorestan, Iran
Behnaz
Garosi
direkvand-a@medilam.ac.ir
10031947532846002694
10031947532846002694
No
Department of Nursing and Midwifery, Branch of Borujerd, Islamic Azad University, Lorestan, Iran
Ashraf
Direkvand-Moghadam
direkvand-a@medilam.ac.ir
10031947532846002695
10031947532846002695
Yes
Psychosocial Injuries Research Center, Faculty of Nursing and Midwifery, Ilam University of Medical Sciences, Ilam, Iran
Ali
Delpisheh
direkvand-a@medilam.ac.ir
10031947532846002696
10031947532846002696
No
Psychosocial Injuries Research Center, Ilam University of Medical Sciences, Ilam, Iran
Azadeh
Direkvand-Moghadam
direkvand-a@medilam.ac.ir
10031947532846002697
10031947532846002697
No
Student Research Committee, Ilam University of Medical Sciences, Ilam, Iran