Calendar based method 1 nbsp nbsp Caution if post menarchal perimenopausal breastfeeding after menses begin delay until after 3 postpartum menses regular cycle resumes using drugs that affect cycle regularity hormones or fertility signs nbsp nbsp Delay us

Calendar-based method:¹<br>
&nbsp;&nbsp;◦ Caution if: post menarchal, perimenopausal, breastfeeding after menses begin (delay until after 3 postpartum menses + regular cycle resumes), using drugs that affect cycle regularity, hormones, or fertility signs.<br>
&nbsp;&nbsp;◦ Delay/use other methods if: breastfeeding, post partum before 3rd menses, post ab before menses resume, irregular vaginal bleeding, using drugs that affect cycle regularity, hormones, or fertility signs.