Why did Eve have to be insulated from the curse?
Eve had to be insulated from the curse so her reproductive cells, passed from generation to generation, would not carry the curse of sin forward. The curse is transmitted only through the father, whose blood system alone contributes to the fetus, leaving the mother's blood entirely separate.
Les explains that Eve was not a rib but was taken from Adam's side, likely the reproductive part, called the germplasm. She had to be insulated from any part of the curse so that the reproductive cells from Eve down to Mary, and probably continuing today, do not carry the curse from one generation to the next except through the father. Only the father precipitates the circulatory or blood system. Physiologically, none of the mother's blood ever becomes part of the fetus; the blood comes from the father. Thus, if the female is insulated in reproduction, she cannot pass down the curse of sin—it must come from the father.