Thanks for the query.PCOS
can occur due to hormonal
And it can affect the fertility
as your doctor told.
So now they have given hormonal pills to you to control the hormone levels in the body and there by decreasing the PCOS.
And it is correct that these pills will prevent pregnancy
till the time you use them.
Possibly your doctor may opted to treat the PCOS first and then she may concentrate on fertility.
So you once discuss these things with your doctor and proceed accordingly.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429