Fig. 1From: Minimum values for midluteal plasma progesterone and estradiol concentrations in patients who achieved pregnancy with timed intercourse or intrauterine insemination without a human menopausal gonadotropina Scatter plot for E2 and P4 concentrations in pregnant cycles without letrozole. Red squares indicate miscarriages (missing or undetectable heart beat at 12 weeks of gestation), and blue diamonds indicate ongoing pregnancies as a confirmed heart beat beyond 12 weeks of gestation. b Scatter plot for E2 and P4 concentrations in non-pregnant cycles without letrozoleBack to article page