yes
Birth control is used primarily as a contraceptive, to decrease periods, and to decrease PMS symptoms
no
they say that working out allot helps decrease it but I'm not sure.
Yes. However you decrease the chances by taking your birth control correctly and by using condoms.
Hormonal birth control methods, including the pill, can decrease the amount of bleeding and cramping with periods. Some women use them for this purpose and not for birth control.
Yes, St John's Wort can decrease the effectiveness of birth control up to 50 percent
Antibiotics will completely eliminate the usefulness of a birth control pill. A secondary source, such as condoms, should be used while on antibiotics to continue the prevention of pregnancy. Usually the medical information on the birth control package states which medicines will interfere with the product.
Natural birth control
Sperm is not affected by hormonal birth control; it does the same thing it does if you're not on birth control, except that there's some decrease in how much sperm can get into the uterus (due to thickening of the cervical mucus). Hormonal birth control affects the egg.
The Roman Catholic Church.By using natural birth control [rythym method ] or abstaining.
Some of the most common methods of natural birth control would be for one to not have sexual intercourse. Other than that one would have to use methods such as a condom or the birth control pill.
I have also wondered this question and with the research that I have done, it says that neither affects the effectiveness of birth control pills