A combination of charting your basal body temperature (BBT), cervical mucus and cervical position and shape will indicate when the most fertile time of your cycle is. Cervical change signals general fluctuations in your estrogen levels and can be very helpful and fairly reliable in predicting your fertility. Checking your cervical position and shape takes some practice. Also, to chart this particular sign, there are some guidelines you should follow to achieve the best results.
Your Cervical Changes and Shape
Right after your period ends, the position of your cervix is low, hard and closed. At this point in your cycle, it should be easily reached by your fingertip and feel as if you are touching the tip of your nose. A firm, pointed shape generally indicates low estrogen and you are considered to be infertile during this time.
As estrogen and fertility increase (immediately prior to ovulation), your cervix softens, opens up and rises to it?s highest point within your body so that it?s harder to reach. The opening increases as well, which makes the slit or tiny hole feel much larger, becoming more receptive to sperm, allowing them to make their way more easily through your cervix. Your cervix remains this way until after ovulation has taken place.
Once ovulation has occurred- when estrogen levels suddenly drop, you can feel your hardened, closed cervix back in its lower (pre-ovulatory) position. Keep in mind that women who have given birth previously may notice that their cervix feels slightly open, even after ovulation. When the position of your cervix drops, it will become easy to reach once more. At this point, you are considered infertile once again and cannot get pregnant.
You should begin observing your cervical position and shape the first day after your period ends. Cervical position can be monitored throughout the day and be done while checking your cervical mucus. Before checking your cervix, be sure to wash your hands thoroughly. The best time to check it is right after you have showered. Sitting on the toilet or with one foot on the toilet seat (or bathtub) may be the most comfortable positions for checking your cervix. You can check your cervical position by gently inserting your finger and feeling for your cervix, which is located at the top of your vagina. Record if it?s hard to reach (high position) or easier to reach (low position) and also if it feels firm or soft. It normally takes a few months to see all the changes in your cervix during your cycle and notice a pattern.
Read more on Fertility Charting