Birth Control pills are wonderful for preventing pregnancy, however sometimes they can cause more problems then you might think. You and your partner need to be very careful when choosing birth control especially if you decide on pills. Once again they are very reliable but some of the hormones that they put into your system can cause some bad side effects. Headaches, pains, nausea, the list goes on and on. One thing that might effect your relationship is they can cause loss of libido in some women. Yes, you heard me correctly, the thing that is suppose to help you feel more comfortable about having sex could actually hinder it.
You and your partner need to monitor the effects after starting a birth control pill. Do they make you upset easier, how do you feel on a daily basis, and again how has her sex drive changed. The only problem is their is not a clear cut answer to any of this. Women love the pill as it gives them more control over their menstrual cycle and everyone reacts differently to different types of pills. So you have to make notes and see if their are any changes and might effect your relationship, when you notice some then you need to speak with your doctor. You might have to go through several different kinds to find one the works for you without having negative side effects.
You just have to do your research on the subject. Check out the Internet there are many documented cases for each type of pill as to the side effects the have caused some women. Look for similarities, but always consult your doctor on these matters. If birth control pills are effecting your relationship maybe you should look at condoms or other forms of birth control that are effective but don't change your body chemistry.
Gentlemen it is also your place to help out. Sometimes you partners needs your help in spotting these side effects. So this is a join effort and could even bring you closer together as a couple.