Do not forward, it is compact contraceptives affect the results of the period cycle, I hope you do not use it later, use the rhythm + condom, to compare the insurance
Female rhythm Self
The date of the general women's ovulation period cramps in the next 14 days before the next period cramps on day 1 counting, countdown to 14 days or less 14 days is the ovulation day, ovulation day and 4 days after the first 5 days and added together known as the ovulation period, for example, a woman period of 28 days period, this period cramps on day 1 in the December 2, then the next period cramps in the Dec. 30 Dec. 2 plus 28 days, then subtracted from December 30 to 14 days, then December 16 is the day of ovulation and the day before ovulation, after 5 days and 4 days, that is, in December 1120 in addition to day of ovulation period and ovulation period, all the rest of the time sexual intercourse for the rhythm in the rhythm may not use any contraceptive drugs and contraceptive |
