create alias double_pregnant (0) -> taur_double_pregnancy (68)
create alias double_pregnancy (0) -> taur_double_pregnancy (68)
create implication taur_double_pregnancy (68) -> taur_upper_pregnancy (85)
create implication taur_double_pregnancy (68) -> taur_lower_pregnancy (273)
create alias impregnation_while_pregnant (19) -> stacked_impregnation (43)