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In the female reproductive system, the menstrual/ovulation cycle is a recurring cycle of physiologic changes that occurs in reproductive-age females - Wikipedia

This tool was developed to help woman to get pregnant, however it also can be used as a calendar based contraceptive method.
The Woman Calendar generates 6 useful charts based on the woman's menstrual cycle data:

• Luteal phase or Menstruation
• Free Sex Days: The time with the lowest pregnancy percentage.
• Fertility: The time with the highest likelihood of sexual intercourse leading to pregnancy.
• Ovulation: Presence of female mature egg that is capable of being fertilized.
• Conception Boy: Highest chance to get pregnant with a Boy.
• Conception Girl: Highest chance to get pregnant with a Girl.

Type Your Menstrual Cycle Data:

Menstrual Cycle Data
	Last Menstrual Date::
	Cycle Length	20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Days
	Menstruation	3 4 5 6 7 8 9 Days

Advices

• Ovulation/Menstrual cycle may differ from woman to woman, therefore pay your doctor a visit in order to better calculate it!
• In case you don't want to get pregnant we advise you to adopt a birth control method (condom, contraceptive pill, Diaphragm, Cervical cap, Lea's Shield,...)
• This is a free service and therefore we cannot be hold responsible for any unwanted pregnancy!
• Although this calendar is based on the Knaus-Ogino (Rhythm) method, it should NOT be used as a contraceptive method when the woman is breast feeding, because the period might not be regular.
• As Christians we advise you to do NOT have sexual intercourse if you are not married!