Can I start trying to have a baby as soon as I take my last birth control pill?
There are no known adverse effects to conceiving right after discontinuing birth control pills. However, doing so can make it difficult to calculate your due date.
A woman's menstrual cycle is often irregular immediately after she stops taking oral contraceptives. In particular the timing of ovulation during the first cycle is quite unpredictable. So if you were to conceive during that first cycle, the standard method of estimating the start of your pregnancy by the first day of your last period would be unreliable.
Ideally, once you discontinue birth control pills, you should use a barrier form of contraception, such as a condom, for two to three months before trying to conceive. If conception does occur within these first months, it’s advisable to use some alternative method of estimating pregnancy such as an ultrasound test.
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