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...

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...

A penetrated ovum was recovered from the oviduct of a 33 year old surgical patient who had had sexual intercourse 26 hr before the operation. The ovum was in the pronuclear stage. The ooplasmic organelles were mainly represented by mitochondria, endoplasmic reticulum components, and Golgi elements. Small vesicles were found in the space between the two sheets of the pronuclear envelope. These v...

This study suggests that paternal age may be inversely associated with reproductive outcome, as demonstrated by a decline in fertilization, blastocyst formation, implantation and cryopreservation rates with advancing age.