FETAL HEART RATES AS DETERMINED BY SONAR IN EARLY PREGNANCY

In this study, a direct observation was carried out on pregnant women in several months of pregnancy by detecting fetal age, fetal length, fetal weight, and normal reactivity of fetal heart beats on ultrasonography. Ultrasonography is a tool that applies the working principle of vibration and waves to the world of health in which mechanical waves that require a medium to propagate. The results showed that the condition of fetal age two to three months in early pregnancy, the transducer on ultrasonography is difficult to detect the weight and length of the fetus. It is mainly because the propagation medium is still tiny, but in conditions of fetal age at four to nine months, the transducer on ultrasonography is able to detect the weight value and fetal length displayed on the ultrasound monitor screen. Therefore, it can be concluded that the working principle of mechanical waves in ultrasonography is one of the developments in physics in the world of technology.

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The pattern of variations in the first trimester fetal heart rate in Indian population: a pilot study

International Journal of Reproduction Contraception Obstetrics and Gynecology ◽

10.18203/2320-1770.ijrcog20194867 ◽

2019 ◽

Vol 8 (11) ◽

pp. 4419

Author(s):

Hethyshi R.

Keyword(s):

Heart Rate ◽

Gestational Age ◽

Fetal Heart Rate ◽

Fetal Heart ◽

First Trimester ◽

Embryonic Heart ◽

Large Sample Size ◽

Crown Rump Length ◽

Heart Rates ◽

South Indian

Background: Fetal heart rate is an indicator of fetal viability. During third trimester and labour the normal range of fetal heart rate is between 110-160 bpm as recommended by the international guidelines. Unlike this, the first trimester embryonic heart rate does not lie in the same range. During the first trimester the normal embryonic heart rate varies between each week of gestation, as determined by a few western studies. Indian studies on the same are not available. Objective of this study was to determine the trend of the fetal heart rate in first trimester of pregnancy in South Indian women.Methods: Transvaginal scan was done in 51 pregnant women with singleton pregnancy attending the antenatal clinic in a medical college hospital. Crown rump length and fetal heart rate were measured and plotted on a graph. Also, the fetal heart rate at different gestational age of our study was compared with the fetal heart rates at the same gestational age from the studies in the western population.Results: The range of fetal heart rate at different weeks of gestation was comparable to the heart rate variations as seen in the western population. The maximum heart rates at 9 weeks of gestation in our study was higher than the heart rate in the western population.Conclusions: Possibility of variation in the fetal heart rates in the first trimester in different populations cannot be ruled out until confirmed by studies with large sample size.

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