this study describes the influences of variations in life history traits and developmental patterns of pelophylax ridibunda. the causes of this variation were investigated by comparing observed patterns of interpopulational differences from geographic variables. the aim of the study was to investigate whether embryos and larvae from different populations of p. ridibunda show the same pattern of...

background: this study was designed to develop a new co-culture system, assess the effect of luteinizing hormone (lh) using sequential media to promote development and increase the quality of 2-cell murine embryos through the 8-16 cell stage to morula and blastocyst stages. materials and methods: monolayers for co-culture were prepared from ovine oviduct epithelial cells (ooec) in dmem/f12 medi...

Research Question: Is maternal age only a gross predictor of chromosome abnormalities in human embryos? Design: Here, we evaluated the less-studied variation abnormality rates embryos patients within same group. Patients undergoing IVF and PGD for chromosomal ~127 different clinics were included. PGT-A analysis was performed by single reference laboratory using array CGH or NGS. To get an estim...

OBJECTIVE To compare final embryo disposition between patients and donor oocyte recipients. DESIGN Retrospective study. SETTING Private infertility practice. PATIENT(S) Patients undergoing IVF with embryo cryopreservation. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Final cryopreserved embryo disposition. RESULT(S) A total of 1,262 patients using autologous oocytes had 5,417 embry...

BACKGROUND The standard embryo cryopreservation method is still less than optimal for biopsied embryos. The aim of this study was to compare the survival of biopsied embryos cryopreserved with four different methods using non-transferable embryos. METHODS Abnormal embryos from one or three pronuclei and spare embryos of grade 3 and 4 were used for this study. Non-biopsied embryos were cryopre...