Princeton scientists have identified genes responsible for controlling reproductive life span in worms and found they may control genes regulating similar functions in humans.
The work suggests that someday researchers may be able to develop ways …
Surrogate mothers do not suffer major emotional problems during or after their pregnancy, or when they hand over the baby to the commissioning parents, researchers told the annual conference of the European Society of Human Reproduction and Embryology today. The latest results from a long-running study into surrogacy by researchers from City University, UK, led by Professor Susan Golombok, found that, contrary to anecdotal reports in the media, none of the 34 surrogate mothers interviewed for the study reported any misgivings about handing over the baby. Any emotional problems that the women did experience after the birth appeared to lessen with time. The majority of surrogate mothers enjoyed good relations with their commissioning couples and did not suffer adverse reactions from their own friends and family.
New research by Israeli fertility experts has challenged current medical opinion, which holds that refraining from sex for up to a week at least is beneficial for men prior to undergoing some types of fertility treatment. Doctors and scientists from Soroka University and Ben-Gurion University of the Negev, Beer-Sheva, tested over 7,200 semen samples for semen volume, sperm concentration and shape, and the percentage and total count of motile (active and moving) sperm. The samples were from around 6,000 men being investigated or treated for infertility who had abstained from sex for periods up to two weeks.