a pregnant girl with a big belly holds a measuring tape on a white background. the concept of measurement and size of the abdomen

abdomen age background belly big childbearing circumference clinic concept deviation doctor doctors fetus gestation gestational girl growth health holds infection intrauterine measurement measuring medicine mother multiple norm obstetrician office oligohydramnios overweight pathology placenta pregnancy pregnant procedure size small stomach sweater tape tapemeasure trimester violet volume week white woman