It depends on the condition. Like, a guy might have sperm that don't swim but the DNA is fine. Or there could be a lack of chemotaxis due to something going with the sperm or the woman's body, so the sperm will be unable to hone in on the egg's location. There are a variety of ways a couple can have difficulty conceiving that IUI won't be able to help, but IUI is less invasive and less expensive than IVF so it's a good idea for people know their options before resorting to IVF.
It depends on the condition. Like, a guy might have sperm that don't swim but the DNA is fine. Or there could be a lack of chemotaxis due to something going with the sperm or the woman's body, so the sperm will be unable to hone in on the egg's location. There are a variety of ways a couple can have difficulty conceiving that IUI won't be able to help, but IUI is less invasive and less expensive than IVF so it's a good idea for people know their options before resorting to IVF.