Abstract
The aims of a first-trimester ultrasound study include localization of the gestational sac, detection of embryonic demise, detection of multiple pregnancies, and confirmation of gestational age. The American College of Obstetrics and Gynecology and American College of Radiology do not recommend routine ultrasound screening in the first trimester of pregnancy. Typically the endovaginal probes used for assessment of first trimester of pregnancy give more information than transabdominal probes and are typically 5–7.5 MHz. Transabdominal probes used in first trimester are often 3.5–5 MHz.
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References
Kaur A, Kaur A. Transvaginal ultrasonography in first trimester of pregnancy and its comparison with transabdominal ultrasonography. J Pharm Bioallied Sci. 2011;3(3):329–38.
Laing FC, Brown DL, Price JF, Teeger S, Wong ML. Intradecidual sign: is it effective in diagnosis of an early intrauterine pregnancy? Radiology. 1997;204:655–60.
Yeh HC. Efficacy of the intradecidual sign and fallacy of the double decidual sac sign in the diagnosis of early intrauterine pregnancy. Radiology. 1999;210(2):579–82.
Yeh HC, Goodman JD, Carr L, Rabinowitz JG. Intradecidual sign: a US criterion of early intrauterine pregnancy. Radiology. 1986;161:463–7.
Fleischer AC, Pennell RG, McKee MS, Worrell JA, Keefe B, Herbert CM, et al. Ectopic pregnancy: features at transvaginal sonography. Radiology. 1990;174(2):375–8.
Fleischer AC, Pennell RG, McKee MS, Worrell JA, Keefe B, Herbert CM, et al. Ectopic pregnancy: features at transvaginal sonography. Radiology. 1990;174:375–8.
Szabó I, Csabay L, Belics Z, Fekete T, Papp Z. Assessment of uterine circulation in ectopic pregnancy by transvaginal color Doppler. Eur J Obstet Gynecol Reprod Biol. 2003;106(2):203–8.
Kirchler HC, Kölle D, Schwegel P. Changes in tubal blood flow in evaluating ectopic pregnancy. Ultrasound Obstet Gynecol. 1992;2(4):283–8.
Ackerman TE, Levi CS, Dashefsky SM, Holt SC, Lindsay DJ. Interstitial line: sonographic finding in interstitial (cornual) ectopic pregnancy. Radiology. 1993;189:83–7.
Reece EA, Petrie RH, Sirmans MF, Finster M, Todd WD. Combined intrauterine and extrauterine gestations: a review. Am J Obstet Gynecol. 1998;146:323–30.
Hann LE, Bachman DM, McArdle CR. Coexistent intrauterine and ectopic pregnancy: a reevaluation. Radiology. 1984;152:151–4.
Rizk B, Tan SL, Morcos S. Heterotropic pregnancy after in vitro fertilization and embryo transfer. Am J Obstet Gynecol. 1991;164:161–4.
Sebire NJ, Rees H, Paradinas F, Seckl M, Newlands E. The diagnostic implications of routine ultrasound examination in histologically confirmed early molar pregnancies. Ultrasound Obstet Gynecol. 2001;18:662–5.
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Singh, A. (2013). Imaging of Acute Obstetric Disorders. In: Singh, A. (eds) Emergency Radiology. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9592-6_12
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DOI: https://doi.org/10.1007/978-1-4419-9592-6_12
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