Music by Metallica and Nirvana has been found to make IVF eggs more fertile, according to a new study.
Scientists researching the so-called "test tube baby" technique compared 1,000 fertilised eggs, with iPods playing a range of music to half of them, including tracks by Nirvana, Metallica, Michael Jackson and Mozart.
They discovered that eggs next to iPods had a five percent higher rate of fertilisation.
It is believed that vibrations from the music help the egg absorb nutrients and remove toxic waste, which improves their fertility, according to the Daily Mail.
"Embryos produced using IVF sit on a dish, stewing in their own juices but those produced naturally are wafted down the fallopian tubes, rocking and rolling all their way to the uterus," said fertility expert Dr. Dagan Wells. "This movement means that the embryo experiences a very dynamic environment, which may have some advantages, particularly in terms of getting rid of waste products. The vibrations caused by music may stimulate this effect.
"One might speculate that techno music, with its pounding bass beat, might do the best job of all," he added.
We'd suggest something by Kyuss or early Queens of the Stone Age, but that's for science to test.