Human trials are about to begin on a new device that goes inside a woman's body for up to four days, holding fresh IVF embryos in place like an artificial fallopian tube. Developed by Swiss company Anecova, the 5mm-long "silicon womb" is pierced with hundreds of 40-micron holes, the better to expose the embryos to the natural environment of the uterus, rather than having to be developed artificially in an incubator. Scientists hope this will improve the chances of successful pregnancy from in-vitro fertilization. [Anecova and New Scientist]