a monitor of a portable ultrasonography showing the head of a fetus with a gestational age ga 18 weeks and 4 days

age baby background birth care check child clinic concept days diagnostic doctor embryo equipment examination fetus focus follow gel gestation gestational gynaecologist gynecology head hospital imaging investigation maternity medical medicine monitor mother obstetric obstetrician patient portable pregnancy pregnant prenatal radiology scan selective showing sign sonar sonogram sonography sound technology transducer ultra ultrasonic ultrasonography ultrasound unborn wave weeks woman