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  • Title: Transfers of frozen-thawed human embryos in cycles stimulated by HMG.
    Author: Lornage J, Boulieu D, Mathieu C, Guerin JF, Pinatel MC, James R, Alvarado C.
    Journal: Hum Reprod; 1990 Jan; 5(1):60-5. PubMed ID: 2108985.
    Abstract:
    A total of 130 transfers of frozen-thawed (F-T) human embryos was carried out after moderate ovarian stimulation with human menopausal gonadotrophin (HMG). Embryos were replaced 3 days after the spontaneous luteinizing hormone (LH) surge or 4 days if ovulation was induced by human chorionic gonadotrophin (HCG). Embryos were thawed a few hours prior to transfer. One-hundred-and-twenty-three transfers were effective and 23 pregnancies were achieved. The rate of ongoing pregnancies per transfer was 17.9% (22/123). The survival rate of embryos originating from cycles stimulated by a combination of an LHRH analogue and HMG in a long protocol (LA-HMG protocol) was significantly lower when compared with the rate of embryos retrieved from clomiphene citrate-HMG (CC-HMG protocol) stimulated cycles (52 versus 67%, P less than 0.05). When fresh embryos originated from cycles stimulated with an LHRH analogue and HMG in a short protocol (SA-HMG protocol), the survival rate was not affected (59 versus 67%, NS). Although the difference was not significant, the ongoing pregnancy rate per transfer according to the three protocols from which the embryos originated seemed to be better with the SA-HMG protocol: 16% with the CC-HMG protocol, 14.5% with the LA-HMG protocol versus 27.6% with the SA-HMG protocol. The success rate was independent of the number of F-T transferred embryos if at least one embryo with 100% intact blastomeres was replaced.
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