HCG reference value for twins Pregnancy is a blessing for every woman, but for mothers who want to conceive twins, special care and attention are often required. HCG (human chorionic gonadotropin) is a pregnancy-confirming hormone whose concentration can be detected in a pregnant woman\’s blood. Since the HCG levels in pregnant women with twins are slightly different from those of ordinary pregnant women, the HCG reference values for twins are also different. This article will introduce the interpretation and interpretation of HCG reference values for twins