A mammalian embryo in the first stage of development, when the fertilised egg has grown into a hollow ball made up of a few hundred cells.
UK Researchers have discovered a molecule in sperm cells that triggers fertilisation. Professor Tony Lai and his team at the University of Wales, Cardiff, announced last week that they have isolated a 'sperm factor' gene that makes a protein which causes egg cells to begin to divide and develop into...
Claims have been made that a new technique, available in the UK, is being used in other countries to select the sex of embryos for social reasons. According to a report published in the Mail on Sunday, blastocyst transfer results in more male embryos than female being transferred to the...
A report in the journal Nature says that scientists in China have inserted human DNA into rabbit eggs that have been stripped of their own chromosomes. The team, from the Sun Yat-Sen University of Medical Sciences in Guangzhou, hopes to use the resulting 'hybrid embryos' in embryo stem (ES) cell...
Culturing embryos to the blastocyst stage during in vitro fertilisation (IVF) increases the likelihood of pregnancy in patients for whom standard IVF has failed, according to a paper published in the August issue of Fertility and Sterility. Dr Jose R Cruz and colleagues at The George Washington Medical Center in...
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