I've only dealt with the pill, condom or spermacide. I can't use latex condoms cause I'm allergic. Spermicide didn't seem to give me too much trouble. Made me a little irritated. Hubby got quite irritated from the spermicide though. I've heard that the diaphram is pretty good. Also there's NuvaRing
NuvaRing She can check at the respective website for side effects and things. Some things work better for one person than they do for others. My mother gained almost a lb a day on the patch. My Sister-in-law liked the shot but she gained weight there too. She used to be size 5 but she's no where near that size now. I wish you good luck in finding the right solution for you.
With regards to Rhythm - have she ever used a basal thermometer and a system utilizing that? Supposely using a basal thermometer will help you know exactly when the woman ovulates and when pregnancy is most likely and least likely. Here's just something I pulled up quick that explains just a little.
Basal Termperature
Good Luck to the both of you.
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