yemisi adegoke. we're on a raid. police have been trying to kick them in, but they haven't been able to just yet. it's a really sort of maze of a house. lots of different rooms, lots of different compartments. the authorities say they're worried some of these brothels could be fuelling a lucrative fertility scam that's taking hold. it's called cryptic pregnancy. the term is a recognised medical condition, but its use has been hijacked by sophisticated fraudsters in parts of nigeria, in a scam that preys on desperate couples struggling with fertility and supports an underground trade in newborn babies. a woman is convinced that if she visits a cryptic nurse or a doctor, she's going to get an injection, a tablet or a solution that she will drink. and after she goes home, she sleeps with her husband, she's going to get pregnant. my colleagues have spent months investigating this. the scammers convince women they're pregnant and only they can deliver the baby. incredibly, they claim the woman could be pregnant for years,