Lambers, Marieke J The position of transferred air bubbles after embryo transfer is related to pregnancy rate. [electronic resource] - Fertility and sterility Jul 2007 - 68-73 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1556-5653 Standard No.: 10.1016/j.fertnstert.2006.11.085 doi Subjects--Topical Terms: AdultAirEmbryo TransferFemaleHumansPregnancyPregnancy Rate--trendsProspective StudiesUltrasonography--methods