Homeopathy can help aid conception for various types of infertility, if you're keen to try a natural route first.
For irregular periods or irregular/absent ovulation - sepia 6c may help
For recurrent miscarriages there is sabina 6c
For total lack of sex drive and depression, leading to inability to conceive, there is aurum.
Silica can also be used to strengthen a weakened immune system.
Phosphorus can be used to treat stress and grief caused by infertility or to help cope with the IVF process, as can Ignatia, which is especially helpful in combatting disappointment.
Regular exercise and a good vitamin B complex may enhance the benefits of your homeopathic programme of treatment.
Sepia 6c is useful for men to enhance a lagging sex drive or solve painful intercourse problems
Medorrhinum may help with impotence
Cold sitz baths can lower your body temperature and therefore encourage the production of healthy sperm, if you are suffering from a low sperm count.
If you live in the UK, you can find a qualified homeopath from the Society of Homeopaths, at http://www.homeopathy-soh.org
For the USA and Canada, try the National Center For Homeopathy, at http://www.homeopathic.org/find.htm