Background: Blood transfusion is one of the most crucial needs of the society in multiple diseases and injuries. The only source of blood is donation. Students consist a large and healthy group who are able of providing a large number of blood donation, however, blood donation is rare amongst them. This study was conducted to evaluate students awareness and attitude towards blood donation in Ke...

The article presents a new system for the recruitment of gamete donors. The system is a partial application of the mirror exchange system: the male partner of a couple donates sperm, and in return, he receives the guarantee that his partner benefits from a greatly reduced waiting time for donor oocytes. More specifically, the woman will obtain donor oocytes within a period of 8 months. The proc...

The motives underlying prosocial behavior, like charitable donations, can be related either to actions or to outcomes. To address the neural basis of outcome orientation in charitable giving, we asked 33 subjects to make choices affecting their own payoffs and payoffs to a charity organization, while being scanned by functional magnetic resonance imaging (fMRI). We experimentally induced a rewa...

Dr. Keiller exhibited a specimen of an entire ovum, which had been expelled prematurely about the fifth month. He had been called to see the patient (who was a servant) some time since; and as she was suspected of being in the family-way, he examined her breasts, and came to the conclusion that she was pregnant. She was taken prematurely in labour, had been sent to the Maternity Hospital, and s...

The comb jelly Mertensia ovum, widely distributed in Arctic regions, has recently been discovered in the northern Baltic Sea. We show that M. ovum also exists in the central Baltic but that the population consists solely of small-sized larvae (less than 1.6 mm). Despite the absence of adults, eggs were abundant. Experiments revealed that the larvae were reproductively active. Egg production and...

There are two populations of sperm in bull semen. One consists of X-chromosome-bearing sperm; the other consists of Y-chromosome-bearing sperm. In contrast, all cattle ova contain an X chromosome. That is why when an X-chromosome-bearing sperm fertilizes the ovum a female (XX) develops, and when a Y-chromosome-bearing sperm fertilizes the ovum, a male (XY) develops. Ratios of the number of male...

to develop until the tenth or twelfth week, the case usually terminates in rupture of the tube, with its well-known symptoms. But at an earlier period than this, during the first five or six weeks, other changes may take place, involving both the developing ovum and the tube in which it is contained. Of these changes, one of the most important and interesting is that of tubal abortion. We may, ...