Fig. 1

Synopsis of early and late resorptions in relation to normal development, Upper panel: Normal antimesometrial implantation (schematic after Rugh) and two early resorptions first detected by ultrasound (US) at day 7. Composite 1: Neutrophilic liquefaction of embryo proper (R2, Table 1). Composite 2: Additional resorption and liquefaction of maternal tissues via foam cells (resorption R1, Table 1). Composites 3–6: Stages of abortion of apoptotic embryos into the uterine lumen