Menstrual Cycle Ovulation Calculator

Ovulation calculator

If you're trying for a baby, knowing when you're ovulating can seem a bit confusing especially if your periods aren't regular. To stand your best chance of conceiving, you need to use an ovulation calculator.


An average woman's menstrual cycle is 28 days but cycles can range from 22 days right up to 36. Your menstrual cycle begins on the first day of your period and continues up to the day before you start your next one.

Use our free ovulation date calculator to find out when you're ovulating over the next six months.

Alternatively, follow these three steps to calculate your ovulation date and find out when you're likely to be most fertile.
Step 1: Your Menstrual Cycle

When your next period starts, make a note of the date. The following month, when your period comes again, make a note of this date, then count the days in between. This will give you your cycle length. You may need to do this for more than one month and take the average, especially if your cycle isn't regular. Remember also that coming off the Pill will reveal your true menstrual cycle.

Example:
Period starts = 1st January
Next period starts = 3rd February
Days in between (including 1st Jan but not 3rd Feb) = 33 days.

Your menstrual cycle length is 33.
Step 2: Your Fertile Dates

Using the chart, find the right number in the menstrual cycle length column (33 for the above example) and read across for your ovulation day and most fertile days.

Cycle length	Ovulation	Most fertile
22	Day 8	Days 7-9
23	Day 9	Days 8-10
24	Day 10	Days 9-11
25	Day 11	Days 10-12
26	Day 12	Days 11-13
27	Day 13	Days 12-14
28	Day 14	Days 13-15
29	Day 15	Days 14-16
30	Day 16	Days 15-17
31	Day 17	Days 16-18
32	Day 18	Days 17-19
33	Day 19	Days 18-20
34	Day 20	Days 19-21
35	Day 21	Days 20-22
36	Day 22	Days 21-23

Step 3

Work out your ovulation and most fertile dates. For the above example:

First day of last period = 3rd February 2008
Cycle Length = 33
Ovulation (19 days later) = 22nd February 2008
Most fertile (18-20 days later) = 21st and 23rd February 2008

Once you know your ovulation date, as a rule, you are most fertile the day before, during and the day after. However, because sperm can survive for up to seven days in the right conditions you could be fertile before and after these days.

N.B These figures are based on averages and should be used as a guide only. Days and dates may differ from woman to woman.

To continue reading ... please follow this link to page 2

Menstruation Cycle Explained

Article Source: goodtoknow .co.uk/family/171819/Ovulation-calculator

Photo Source: electrical-res. com/EX/10-17-00/fhe033.jpg