<<<<I don't have any real scientific explanation for it. Just seems that some prefer it one way and some another. Possibly it's a cost thing? It is significant for low income mothers whose insurance won't cover it (though it is usually covered) or don't have insurance at all. If they can wait and find that maybe they won't need it?>>>>> The explanation for the need is "scientific." Rhogam is NOT something you can "wait and see" about or something that insurance "doesn't cover." Rhogam must given within 72 hours of delivery if mother is negative and baby is positive. period. If not, those antibodies WILL develop if mom is neg and baby is pos. My kids are teens and older now and I only received it post delivery but I understand in the last few years, it has been given at 28 weeks, AND after delivery if blood work indicates that mom is or maybe developing antibodies to the baby's blood. Not giving it could be fatal to the next pregnancy. A doctor WOULD not "wait" and see. Please go back and read the messages that have been posted recently that explain how antibodies develop. There are "good" antibodies and "bad" antibodies and Rhogam is given to prevent the bad ones from proliferating. Mary Kay Smith, IBCLC Romeoville IL *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html