1. Summary 1. Embryonic Development and Viability in Livestock Species 1.1. Techniques for analyzing maternal contributions to embryonic viability 1.2. Physiological basis of embryonic viability in the female genital tract 2. Evaluation of Embryonic Viability 2.

during assisted reproductive technology (art) procedures, the transfer of a single embryo dramatically reduces the rate of multiple pregnancy. proper information, therefore, should be delivered to patients before embryo transfer. in many countries, regulations limit, according to age of the patient, the number of embryos to be transferred. selective fetal reduction should not be considered as a...

Synchronous hatching within single egg clutches is moderately common in locusts and other insects can be mediated by vibrational stimuli generated adjacent embryos. However, non-locust grasshoppers, there has been little research on the patterns of mechanisms controlling time hatching. In this study, six grasshoppers ( Atractomorpha lata , Oxya yezoensis Acrida cinerea Chorthippus biguttulus Ga...

  Effect of Cervical Mucus Aspiration with Insulin Syringe on Pregnancy Rate in ART Cycles     A. Aflatoonian MD1*, M. Asgharnia MD 2, N.Tabibnejad GP3     1- Associated Professor, Dept. of Gynecology, University of Medical Sciences and Research and Clinical Center of Infertility, Yazd, Iran   2- Assistant Professor, Dept. of Gynecology, Guilan University of Medical Sciences, Rasht, Iran   3- G...

Background: Hyaluronan (HA) is a structural component of extracellular matrix synthesised by HA synthases HAS1-3, which produce HA of different molecular sizes with distinct biological functions associated with reproductive processes. Hyaluronidase (HYAL) cleaves the HA into biologically active small fragments which are known to regulate cell proliferation through CD44 receptor signaling. HA is...

Background: Controlled ovarian stimulation (COS) has been shown to advance endometrial maturation and affect adversely implantation in assisted reproduction technology (ART) cycles. It has been reported that there is a better embryo-endometrium synchrony in frozenthawed embryo transfer (FET) cycles than fresh embryo transfer (ET) cycles. The Background of this study was to compare ongoing pregn...

Although progress was made in in vitro fertilization (IVF) techniques, the majority of embryos transferred fail to implant. Morphology embryo scoring is the standard procedure for most of IVF centres for choosing the best embryo, but remains limited since even the embryos classified as "top quality" may not implant. As it has been shown that i) CD146 is involved in embryo implantation and ii) m...

Cumulative pregnancy rate has been significantly increased since frozen-thawed embryo transfer was applied in ART cycles. This method has become an essential part of IVF/ICSI treatment. Luteal phase support has been proven to be associated with higher rate of live birth rate. Human chorionic gonadotropin (HCG), and progestrone have been successfully used for luteal phase support in ovarian stim...

OBJECTIVE The correlation of the embryo matrix metalloproteinase-9 (MMP-9) secretion, embryonic development and clinical pregnancy was investigated. MATERIALS AND METHODS The embryo culture from in vitro fertilization-embryo transfer (IVF-ET) patients were collected in the Xuzhou Central Hospital from January 2013 to September 2014. At the same time, the embryo grade was recorded. The secreti...