Unexplained infertility - Any other tests/options apart from IVF?

Hi,

Doctors say i have unexplained infertility

- My periods are regular, no PCOS

- Tubes are checked, i ovulate regularly

- DH's parameters are fine

Still trying for almost 4 years without luck . 5 IUIs [Tablets & Injections ]

Doc asks to go for IVF now. But i am very scared and not at all comfortable with the process . Is IVF linked to birth defects ? Is there higher chance of cancer for the mother due to the hormone injections ?

Desperately looking for something which can throw light on why it's not happening

Laproscopy isn't done.But doctor says that it's not required [probably i don't have any symptoms , never even had period pains]

i have chronic food and dust allergy and sneeze very often . i read something about Natural Killer cells which don't allow the embryo to implant . Docs in India don't give much weightage to that. ANY idea if any docs in Bangalore or Chennai do such tests?

Im 32 now. Can someone please tell me what are the other options i have apart from IVF? Something which people with unexplained infertility have had success in? . i'm feeling very depressed :(

Unexplained infertility - Any other tests/options apart from IVF?