The study results could help infertile (human) couples have kids. The scientists are already screening infertile women to see if they have problems with their Juno receptors. If that is the case, these women may be able to undergo a procedure called intracytoplasmic sperm injection, which involves injecting the sperm into the egg and then re-implanting it. "It is remarkable that about 20 percent of infertility cases have an unexplained cause," co-author Enrica Bianchi of the Sanger Institute, told Reuters. "We are now asking whether Juno is involved in these cases of unexplained infertility."