How long are your cycles? If your cycles are always longer than 21 days, the chances of you ovulating soon enough for the sperm to survive long enough to fertilize an egg are quite low. If your boyfriend pulls out in plenty of time, there's no sperm present to fertilize the egg anyway.
This table tells you the actual pregnancy risk of various forms of birth control: http://en.wikipedia.org/wiki/Comparison_of_birth_control_methods#Comparison_table
Now, to be clear, any time you have PIV sex, there's a *chance* of pregnancy, whether you're using the birth control pill, condoms, pull out, tubal ligation, an IUD, something else, or some combination. But the chance in the scenario your boyfriend describes is quite low. In fact, the chances are lower than if you are just using condoms in the middle of the month.
But there are plenty of reasons that people might not want to choose any given means of contraception. For instance, if your period is sometimes spotty in the first couple days and you don't feel confident saying which days are the first two. For instance, if you aren't sure that your boyfriend has the self-control to pull out in time. For instance, if you prefer to use condoms because you can check them afterward for breaks.
It's all about what you're comfortable with. If you aren't comfortable with going without condoms, then keep using them.
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Date: 2012-02-17 06:53 pm (UTC)This table tells you the actual pregnancy risk of various forms of birth control: http://en.wikipedia.org/wiki/Comparison_of_birth_control_methods#Comparison_table
Now, to be clear, any time you have PIV sex, there's a *chance* of pregnancy, whether you're using the birth control pill, condoms, pull out, tubal ligation, an IUD, something else, or some combination. But the chance in the scenario your boyfriend describes is quite low. In fact, the chances are lower than if you are just using condoms in the middle of the month.
But there are plenty of reasons that people might not want to choose any given means of contraception. For instance, if your period is sometimes spotty in the first couple days and you don't feel confident saying which days are the first two. For instance, if you aren't sure that your boyfriend has the self-control to pull out in time. For instance, if you prefer to use condoms because you can check them afterward for breaks.
It's all about what you're comfortable with. If you aren't comfortable with going without condoms, then keep using them.