Early pregnancy losses in in vitro fertilization and oocyte donation Carlos Simón, M.D., Jose Landeras, M.D., Jose L Zuzuarregui, Ph.D., Julio Cesar Martı́n, Ph.D., José Remohı́, M.D., Antonio Pellicer, M.D. Fertility and Sterility Volume 72, Issue 6, Pages 1061-1065 (December 1999) DOI: 10.1016/S0015-0282(99)00408-2
FIGURE 1 Results of oocyte donation and IVF cycles. ∗The highest urine β-hCG value obtained in the control group for each technique studied was considered the threshold level. Any value above the threshold for 2 consecutive days was considered positive for the purposes of the study. †Number of patients with positive urinary β-hCG from day 6 to 14 after transfer with a negative pregnancy test at day 16. Numbers in parentheses are percentages. Simón. Early pregnancy losses. Fertil Steril 1999. Fertility and Sterility 1999 72, 1061-1065DOI: (10.1016/S0015-0282(99)00408-2)