What is the difference between an ob/gyn and a fertility doc?

Training - Services. Fertility docs who are rei trained also provide some services that an ob/gyn doc does not (usually). For example, rei docs offer ivf, icsi, donor egg and surrogacy services that virtually no ob/gyn provides. Rei physicians spend over 90% of their time on fertility disorders unless they are university-based. Rei docs usually handle the most difficult cases too. Hope this helps.