Human chorionic gonadotropin beta (hCG beta) is the unique subunit of hCG, critical for pregnancy detection and a valuable biomarker in gestational trophoblastic disease, germ cell tumors, and multiple cancers. Elevated hCGβ levels are strongly linked to tumor progression, metastasis, and poor prognosis, making it a prime antibody target. Catalina’s anti-hCGβ antibodies provide superior specificity and minimal cross-reactivity with related hormones (LH, FSH, TSH). These antibodies enable accurate detection of hCGβ for advancing cancer biology, reproductive biology, biomarker discovery, and therapeutic antibody development.