Besides the ethical concerns surrounding embryo-destructive stem cell research and cloning, there are health concerns for the women "used" in this research.

Women are under increasing pressure to donate their eggs (ova) for research purposes of to freeze for future use.

However, the short-term risks to women, such as overstimulation of the ovaries, can result in infertility and even death. The long-term risks have not yet been adequately studied.