the three meds together will not interfear with each other's efectivness.
I know why your doc recomends using a condom in addition -because when Spironolactone is used and the woman gets pregnant- 100% of the time there are birth defects. Its bad enough that FDC requests all women taking it to also take birthcontrol pills. Even me, who has NO EGG responce, had to agree to take BCP to take it.
I heard Yasmin has a tendancy to have a higher failure rate IF you do not take it exactly the right way- ie as close to the same time every day without missing a day etc. But if you do it right, the failure rate is less than 1% for normal fertility. PCOS paitents have way less of rate of fertility so I would say if you take the Yazmin right- the chances of pregnancy is about .000000000000000001%
I believe the avarage PCOS lady can take 2-5 years (or more) to get pregnant with optimal sex timing and regular periods when not using any BC.
However- if you feel ANY reservations- it never hurts to take other precautions, like keeping track of your cycles and avoiding having sex the middle of your cycle (the week of abouy 3 weeks before your next period is due- called the rythem method)
OR always use a condom. (hey using a condom also makes it easier to clean up- Boys are so messy)
Current thoughts are if you were DXed with PCOS early and put on BCP, that can help preserve your fertility for when you are ready later. So you're on the right track.
BTW- the boy better NOT be pressuring you into cashing in your V-card. if he is- Your knee needs to have a "talk" with his junk.
Vicky, Dx PCOS /IR in 2000 at age 23, on Metformin1500mg daily, 7th cycle on Clomid.