Metode ini diawali dg pengamatan pola siklus haid selama 6-12 bulan yg kemudian akan didpt siklus terpendek dan terpanjang, klo udah ketemu dpt dihitung sbb : - Awal masa subur adalah siklus tependek dikurangi dengan 18 hari - Akhir masa subur adalah siklus terpanjang dikurangi dengan 11 hari Misal : Siklus terpendek 24 hari dan siklus terpanjang 32 hari Awal masa subur : 24 â 18 = 6 akhir masa subur : 32 â 11 = 21 Jadi masa subur adalah mulai hari ke-6 sampai hari keâ21 dihitung dari hari pertama haid terakhir Devi, mama Gabby DISCLAIMER : The information contained in this communication (including any attachments) is priveleged and confidential, and may be legally exempt from disclosure under applicable law. It is intended only for the specific purpose of being used by the individual or entity to whom it is addressed. If you are not the addressee indicated in this message (or are responsible for delivery of the message to such person), you must not disclose, disseminate, distribute, deliver, copy, circulate, rely on or use any of the information contained in this transmission. We apologize if you have received this communication in error; kindly inform the sender accordingly. Please also ensure that this original message and any record of it is permanently deleted from your computer system. We do not give or endorse any opinions, conclusions and other information in this message that do not relate to our official business.