There are many egg donors who have experienced hair loss, thyroid and other hormone imbalances such as weight gain, sciatica pain, muscle loss, infertility, PCOS, endometriosis, cancers.
Ovarian Hyperstimulation Syndrome (OHSS) is a complication of fertility treatments, particularly IVF, where the ovaries become enlarged and release fluid into the body. It can range from mild discomfort to a serious condition requirement hospitalization.
The Guardian April 2006: Cruel cost of the human egg trade