Kumar, A Retrograde tubal embryo transfer in natural cycle in-vitro fertilization. [electronic resource] - Human reproduction (Oxford, England) Mar 1997 - 484-6 p. digital Publication Type: Clinical Trial; Controlled Clinical Trial; Journal Article ISSN: 0268-1161 Standard No.: 10.1093/humrep/12.3.484 doi Subjects--Topical Terms: AdultEmbryo Transfer--methodsFemaleFertilization in VitroHumansPregnancy