RT Book, Section A1 Monteagudo, Ana A1 Timor-Tritsch, Ilan E. A1 Haratz-Rubinstein, Natan A1 Malinger, Gustavo A2 Malinger, Gustavo A2 Monteagudo, Ana A2 Pilu, Gianluigi A2 Paladini, Dario A2 Timor-Tritsch, Ilan E. SR Print(0) ID 1194695497 T1 Biometry of the Fetal Brain T2 Timor's Ultrasonography of the Prenatal Brain, 4e YR 2023 FD 2023 PB McGraw Hill Education PP New York, NY SN 9781260136166 LK obgyn.mhmedical.com/content.aspx?aid=1194695497 RD 2024/04/18 AB Prenatal diagnosis should be instituted accurately and early enough to achieve an excellent level of care of the obstetric patient. Ultrasonography, with its excellent resolution and image quality, makes it easier for health care providers to reach appropriate management decisions. Assessing whether the size of a structure is normal or abnormal may not always be feasible, but if doubt exists regarding its normalcy, it must be carefully and diligently pursued. In addition, several measurements, such as the biparietal diameter (BPD) and the head circumference (HC), can also be used to determine the gestational age of a fetus, especially during the first half of pregnancy. Correct estimation of gestational age is of paramount importance because adequate management of both low-and high-risk obstetric populations relies heavily on knowing the precise gestational age.