in a prospective study of 847 singleton pregnancies , the importance of various endocrine methods ( serum estriol , hpl , sp1 , beta-hcg , estradiol-17 beta , urinary estrogen excretion ) and of two sonographic measurements ( biparietal and thoracic diameter ) for the diagnosis of growth retardation in the third trimester was studied .
C0032961
pregnancies
C0106132
beta-hcg