if a man can be sued for child support due to his donoring sperm, then wouldnt the same be true for egg donors. as mercurior said.. and as can be seen on his links, and the ones below, these IVF parents may and could do anything to get more money for themselves..
http://www.hofstra.edu/FORMS/FORMS_printPage.cfm?thepage=law_lawrev_shapo2 (warning very complicated the line with the **is important)
There is little law settling the legal status of the parties to IVF, egg donation, and embryo donation and transfer. Most commentators suggest that egg donation and sperm donation should be treated similarly: the donor should have no parental rights or obligations towards the resulting child, and the gestational mother and her consenting husband should be the legal parents.[292] This result is supported not only on the ground that a gestational mother should always be the presumed mother,[293] but also because she intends to raise the child.[294] The few statutes that apply to IVF designate the gestational mother and her husband as the child's legal parents.[295] Yet, the situations may not be completely analogous.[296] A woman donor, unlike a male donor, undergoes invasive, lengthy treatment with possible physiological side effects.[297] Consequently, it may be more likely that some egg donors undergo the treatment intending to play a parental role. Embryo donation also may not be completely analogous to sperm donation because it involves two gamete donors whose intentions regarding parenting may differ. In addition, the progenitors of the embryo may have been unsuccessful at procreating a child themselves or may have lost a child and may want to play a parental role to the child born of their embryo.
** The IVF statutes do not take account of these differences between donors, and, as described below, they leave other issues unanswered.
Under another subsection, the child is not the child of the embryo donors if the recipient husband and wife consent to the implantation,[320] though such consent is not required to be in writing. The wife most likely would have consented in writing to the implantation procedure, but if her husband did not consent, it is possible that both donors, along with the recipient woman, would be the parents of the resulting child
http://www.med.howard.edu/ethics/ethics/cases/emb.htm
And now that a child can have three mothers (genetic, gestational and rearing), who is responsible when all--or perhaps none--want the child
http://www.canadiancrc.com/articles/Boston_Globe_Partner_child_support_lesbians_sperm_donor_01MAR04.htm
http://www.mobar.org/journal/2005/janfeb/schlesinger.htm