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The low rates of embryo implantation within the uterus are attributed, among other factors, to the ET technique, which depends on a multitude of anatomical, physiological, and mechanical aspects. We developed computational and experimental models to simulate ET to examine the contribution of mechanical features to the success of this procedure. The experimental model allowed laboratory simulations of the dispersion of the catheter load as a result of different injection speeds into a tilted uterine model. The mathematical model analyzed potential trajectories of the transferred embryos resulting from the interaction between the injection velocity and the intrauterine flows caused by uterine peristalsis. The simulations revealed the important contribution of mechanical parameters, such as the position of the uterus and the presence of air in the catheter load. The latter was found to increase the potential for the embryo to be near the fundal area during the time limit for implantation. Based on the results of our simulations, we recommended performing ET in a patient\u2010specific position in which the fundus will be the highest point above the horizon and that the load be delivered slowly, that is, not less than 10 s. We also recommended placing the tip of the catheter at the mid cavity to avoid ectopic pregnancy.<\/jats:bold> <\/jats:p>","DOI":"10.1196\/annals.1389.028","type":"journal-article","created":{"date-parts":[[2007,4,26]],"date-time":"2007-04-26T20:28:30Z","timestamp":1177619310000},"page":"21-37","source":"Crossref","is-referenced-by-count":15,"title":["Bioengineering Studies of the Embryo Transfer Procedure"],"prefix":"10.1111","volume":"1101","author":[{"given":"OSNAT","family":"EYTAN","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"DAVID","family":"ELAD","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"ARIEL J.","family":"JAFFA","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2007,4,18]]},"reference":[{"key":"e_1_2_5_2_2","volume-title":"Structure and function in man","author":"Jacob S.W.","year":"1974"},{"key":"e_1_2_5_3_2","volume-title":"Human reproduction conception and contraception","author":"Hafez E.S.E.","year":"1980"},{"key":"e_1_2_5_4_2","volume-title":"Human physiology: the mechanisms of body function","author":"Vander A.J.","year":"1990"},{"key":"e_1_2_5_5_2","first-page":"1033","volume-title":"Textbook of Medical Physiology","author":"Guyton A.C.","year":"1996"},{"key":"e_1_2_5_6_2","first-page":"462","volume-title":"Infertility: a comprehensive text","author":"Seibel M.M.","year":"1997"},{"key":"e_1_2_5_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0015-0282(16)53760-1"},{"key":"e_1_2_5_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0015-0282(16)47560-6"},{"key":"e_1_2_5_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0015-0282(16)55644-1"},{"key":"e_1_2_5_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9378(90)90983-E"},{"key":"e_1_2_5_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0015-0282(16)58207-7"},{"key":"e_1_2_5_12_2","first-page":"627","article-title":"The dynamics of rapid sperm transport through the female genital tract: evidence from vaginal sonography of uterine peristaltic and hysterosalpingoscintigraphy","volume":"3","author":"Knuz G.","year":"1996","journal-title":"Hum. 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