PURPOSE: To ascertain whether the use of hyaluronan-enriched transfer medium (HETM) improves pregnancy and implantation rates among embryo transfer patients with a history of multiple implantation failures. METHODS:Patients (n = 314) under the age of 40 and with a history of multiple unsuccessful embryo transfers were enrolled. There were three groups of patients: those undergoing fresh embryo transfer (fresh ET [n = 111]), those undergoing vitrified-warmed ET in the natural cycle (WET-N [n = 101]) and those undergoing WET in a hormone replacement cycle (WET-H [n = 102]). On the day of ET, patients were randomized to HETM (0.5 mg/ml hyaluronan) or control medium containing no hyaluronan. Only patients with good quality embryos on day 3 were included. RESULTS: For all three patients groups (fresh ET, WET-N and WET-H) pregnancy rates (37.5 %, 31.4 % and 41.2 %, respectively) were significantly higher when using HETM compared with control medium (10.9 %, 10.0 % and 15.7 %, respectively; p < 0.05), and implantation rates when using HETM were also significantly higher compared with control medium (p < 0.05). Miscarriage rates were similar in both groups. CONCLUSION: HETM significantly increased pregnancy and implantation rates among embryo transfer patients with a history of multiple unsuccessful implantations-regardless of method used to prepare the endometrium.
RCT Entities:
PURPOSE: To ascertain whether the use of hyaluronan-enriched transfer medium (HETM) improves pregnancy and implantation rates among embryo transfer patients with a history of multiple implantation failures. METHODS:Patients (n = 314) under the age of 40 and with a history of multiple unsuccessful embryo transfers were enrolled. There were three groups of patients: those undergoing fresh embryo transfer (fresh ET [n = 111]), those undergoing vitrified-warmed ET in the natural cycle (WET-N [n = 101]) and those undergoing WET in a hormone replacement cycle (WET-H [n = 102]). On the day of ET, patients were randomized to HETM (0.5 mg/ml hyaluronan) or control medium containing no hyaluronan. Only patients with good quality embryos on day 3 were included. RESULTS: For all three patients groups (fresh ET, WET-N and WET-H) pregnancy rates (37.5 %, 31.4 % and 41.2 %, respectively) were significantly higher when using HETM compared with control medium (10.9 %, 10.0 % and 15.7 %, respectively; p < 0.05), and implantation rates when using HETM were also significantly higher compared with control medium (p < 0.05). Miscarriage rates were similar in both groups. CONCLUSION: HETM significantly increased pregnancy and implantation rates among embryo transfer patients with a history of multiple unsuccessful implantations-regardless of method used to prepare the endometrium.
Authors: K Ropponen; M Tammi; J Parkkinen; M Eskelinen; R Tammi; P Lipponen; U Agren; E Alhava; V M Kosma Journal: Cancer Res Date: 1998-01-15 Impact factor: 12.701