bibliographicCitation |
Christodoulou CN, Zonas C, Loukaides T, Maniatis A, Giannikos L, Giannakopoulos C, Fassoula M. Low beta-hCG is associated with poor prognosis in association with an embryo with positive cardiac activity. Ultrasound Obstet Gynecol. 1995 Apr;5(4):267–70. doi: 10.1046/j.1469-0705.1995.05040267.x. PMID: 7541303. |