Sheep, mice, cattle, goats and pigs have all been cloned by transfer of a donor cell nucleus into an enucleated ovum, and now we add the successful cloning of a cat (Felis domesticus) to this list. However, this cloning technology may not be readily extendable to other mammalian species if our understanding of their reproductive processes is limited or if there are species-specific obstacles.

pregnancy had not advanced beyond the third week, as judged by the condition of the embryo, it has the anatomical interest which is still attached to any human ovum of that early period, in addition to the more strictly obstetrical one, in tracing, if possible, the cause of the abortion and presumably of those which preceded and followed it. The patient is a woman of 28 years of age, who has be...

In Vitro Fertilization (IVF) is the penetration of ovum cells by spermatozoa in a culture system and reproductive technique that useful for increasing efficiency sperm utilization. vitro fertilization applied to overcome problem infertility prevent birth defects. The success IVF influenced quality spermatozoa. order fulfill this, it necessary select spermatozoa, which separate good from total p...

At a time when urban expansion and regeneration are being prioritized, many cities undergoing significant widespread decay. Planning issues, such as the of historical areas redevelopment blighted neighborhoods, have prompted complex agenda to be put in place for planning practice. The most district is city’s core. It crucial indicator success because it contains Central Business District (CBD) ...

Theory predicts that sperm competition will generate sexual conflict that favours increased ovum defences against polyspermy. A recent study on house mice has shown that ovum resistance to fertilization coevolves in response to increased sperm fertilizing capacity. However, the capacity for the female gamete to adjust its fertilizability as a strategic response to sperm competition risk has nev...

To clarify the pathogenesis of anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis in patients without ovarian teratoma, we investigate normal human ovary, normal bovine ovary and bovine ova. On the basis of immunohistochemical studies, normal human ovary expressed NR2B epitope in primordial oocytes. The results of SDS-PAGE and immunoblotting using bovine ovarian tissues and ova, we identif...

The technique of ultrasound-guided transvaginal follicular aspiration for ovum pick-up (OPU), is a non-invasive procedure for recovering oocytes from antral follicles in live animals. It was developed in the human [1,2] to assist human infertility. When people realized its application prospect, considerable researches have been aimed at applying this technology in the bovine. In 1987, an ultras...