It depends , reading below you will find your answer.
If you have been taking birth control for more than 2 months, have properly been taking your birth control, have not experienced spotting or breakthrough bleeding as side effects and have not been taking antibiotics, you do not necessarily have to use a back up method, because you will still be protected from pregnancy during your placebo week.
Barrier method - condoms or diaphragm. Hormonal - 'the pill'
Not a great idea. You'll be at risk of pregnancy for the week after you finished the placebo pills, and for the first week of the next cycle. Be sure to use a second method, like condoms or abstinence from vaginal sex.
There are several birth control methods out there. However, the only 100% effective method is abstainance, as condoms can have holes in them, he might not pull out in time, and pills don't always work.
The most inexpensive birth control method is to not have sex at all! If this isn't an option for you, buy condoms from the store, which are inexpensive compared to the cost of a child.
Antibiotics reduce the effectiveness of birth control. You should use a backup method like condoms.
Immediately. if you do not wish to have another baby use condoms and/or a reliable method of birth control.
Yes the pre ejaculation contains sperm. That is why the pull out method does not always work, and you still can get pregnant. So use condoms or another birth control method. There are many to choose from but you can still catch an std so condoms or abstain is your best method.
Using condoms with another contraceptive method, for example birth control pills, every time you have sex for extra protection
The copper IUD has no hormones, and lasts for 5-7 years. And of course there are always condoms and the sponge.
There is no advantage to using the birth control patch and birth control pill at the same time. They have the same mode of action. If you want to double up on methods, try using a barrier method like condoms along with a hormonal method.
Some men would welcome the opportunity for a reliable method under which they had total control. At this time, only condoms and vasectomy are within a man's control.
Condoms, IUDs, birth control pills, depot birth control medications (e.g. monthly, or quarterly), morning-after pill methods, contraceptive sponge, cervical cap, sterilization ... and the least effective method of contraception - the "rhythm method".