em ▁cell ▁exper ts ▁consider ▁it ▁unlikely ▁that ▁such ▁large ▁numbers ▁of ▁human ▁egg ▁don ations ▁would ▁occur ▁in ▁a ▁developed ▁country ▁because ▁of ▁the ▁unknown ▁long - term ▁public ▁health ▁effects ▁of ▁tre ating ▁large ▁numbers ▁of ▁health y ▁young ▁women ▁with ▁heavy ▁dos es ▁of ▁h orm ones ▁in ▁order ▁to ▁indu ce ▁hyper ov ulation ▁( ov ulating ▁several ▁eggs ▁at ▁once ). ▁Although ▁such ▁treat ments ▁have ▁been ▁performed ▁for ▁several ▁dec ades ▁now , ▁the ▁long - term ▁effects ▁have ▁not ▁been ▁studied ▁or ▁declared ▁safe ▁to ▁use ▁on ▁a ▁large ▁scale ▁on ▁otherwise ▁health y ▁women . ▁Long er - term ▁treat ments ▁with ▁much ▁lower ▁dos es ▁of ▁h orm ones ▁are ▁known ▁to ▁increase ▁the ▁rate ▁of ▁cancer ▁dec ades ▁later . ▁Whether ▁h orm one ▁treat ments ▁to ▁indu ce ▁hyper ov ulation ▁could ▁have ▁similar ▁effects ▁is ▁unknown . ▁There ▁are ▁also ▁eth ical ▁questions ▁surrounding ▁pay ing ▁for ▁eggs . ▁In ▁general , ▁market ing ▁body ▁parts ▁is ▁considered ▁un eth ical ▁and ▁is ▁b anned ▁in ▁most ▁countries . ▁Human ▁eggs ▁have ▁been ▁a ▁notable ▁exception ▁to ▁this ▁rule ▁for ▁some ▁time . ▁ ▁To ▁address ▁the ▁problem ▁of ▁creating ▁a ▁human ▁egg ▁market , ▁some ▁stem ▁cell ▁research ers ▁are ▁investig ating ▁the ▁possibility ▁of ▁creating ▁artificial ▁eggs . ▁If ▁successful , ▁human ▁egg ▁don ations ▁would ▁not ▁be ▁needed ▁to ▁create ▁custom ▁stem ▁cell ▁lines . ▁However , ▁this ▁technology ▁may ▁be ▁a ▁long ▁way ▁off . ▁ ▁Pol