The DBA/2J mouse strain is a standard laboratory strain that is widely used for biomedical research. This strain, however, suffers from poor reproductive performance. In addition, the conditions for reliable embryo transfer (ET) of this strain have not been elucidated. The intention of this study was to determine the optimal number of embryos for transfer that allow the effective production of ...

The aim of the present study was to assess the effects of porcine circovirus type 2 (PCV2) on porcine embryos and their receptor sows during the first 21 days of pregnancy. Hatched blastocysts exposed to 10(5.0) TCID50 PCV2 per ml (strain 1121, fifth passage PK15) and negative control embryos were transferred to PCV2-immune receptor sows at the 7th day of the cycle. Two weeks after transfer (D2...

ABSTRACT Global advances in reproductive biotechnology have allowed for the transfer of embryos from donor females with high genetic merit to recipients using cryopreservation technique, which preserves an embryo excellent quality and viability, thereby achieving a feasible pregnancy rate. The objective this study was evaluate viability Holstein that been cryopreserved more than 40 years under ...

In two series of experiments, two D6 morulae were surgically transferred either to each uterine horn of recipient ewes or to the same horn. When embryos were transferred to each side, the percentages of lambs born were not significantly different (68 and 62.5% respectively) whether the corpora lutea of recipient ewes were on each ovary or on the same ovary (in this case, embryos were transferre...

OBJECTIVE The main objective of this study was to assess the prevalence of overweight and obesity among patients undergoing assisted reproductive technology (ART) in Latin America and its consequences on treatment outcomes. METHODS We used the Latin American Registry of ART to obtain women's age and body mass index (BMI), cancellation rate, number of oocytes retrieved and embryos transferred,...

BACKGROUND It is conceivable that defective embryo hatching plays a part in the mechanisms involved in the decrease of embryo implantation rates with advancing age. In an effort to test this hypothesis, we tested the effectiveness of assisted hatching (AH) in women > or =37 years of age. METHODS We prospectively studied 103 IVF-embryo transfer patients undergoing 103 embryo transfers. All of ...

objective: basal fsh levels reflect ovarian response and more formed embryos. we investigated a reliable fsh range to retrieve more oocytes and embryos. materials and methods: two hundred patients in art cycles underwent this study from apr 2007 to sep 2008. patients were divided in three groups based on value of fsh: group a≤8 iu/ml, 8 iu/ml < group b≤10 iu/ml, group c>10 iu/ml and results of ...

The most important benefit of embryo transfer (ET) in the swine industry is the ability to introduce new genetic stock as replacement herd animals with minimal risk of disease transmission and cost for transportation, in comparison with the transport of live animals. However, the commercial application of ET in the pig has been limited because of the need for surgical procedures for both the co...