DOI: 10.36347/sjams.2019.v07i06.005

Pages: 2068-2073

This was analytical cross sectional study aimed to estimate the gestational age using fetal mandible length in second and third trimester by ultrasound. The problem of study was that lack of local previous studies regarding the topic, and in institutions there is no recommendation to include the fetal face in routine ultrasound screening during pregnancy. The study done in 114normal pregnant women in second and third trimester, the study was done in number of Khartoum hospitals (Alsaudi hospital, Professor Abd alsamad Mohamed Salih Center for Radiology and Ultrasound training and Chinese Sudanese Friendship Hospital) in period from February to august 2018. The study found that the fetal mandible length per millimeters equal gestational age per weeks, there was linear relationship between mandible length per millimeters and gestational age by last menstrual period, bi-partial diameter, femur length and abdominal circumference per week's age, there was strong signified correlation between them. Fetal mandible length increased by increasing of gestational age, mandible length per mm equal gestation age by Last Menstrual Period (R2 = 0.999), GA LMP = 0.998 ML+0.107, there was linear relationship between mandible length per mm and gestational age by Last Menstrual Period per weeks.The study concluded that Mandible Length per mm can be used as single parameter for estimation of gestational age. Viability of standard protocol for measurement of mandible length all obstetric departments and uses of international guidelines and protocol for scanning mandible length to give accurate result.