Your Period, There is A Wide Range Of Normal
Getting pregnant has everything to do with your menstrual cycle. There are a number of people who believe that the moon controls the rhythm of our menstruation.See also: www.getpregnantover40.com for articles on lengthening your menstrual cycle and natural ways to increase progesterone
If you talk with different women, you will find that there is quite a bit of variability in the length of the cycle and the time between each cycle (the first day of your period is "day one" Read more about menstruation and menstrual myths:
Menstrual Myths
Every woman's cycle is or should be 28 days long.
A woman cannot ovulate or get pregnant while she is menstruating. very woman will or should bleed every month.
Every woman will or should ovulate every cycle.
If a woman bleeds, she is not pregnant.
The above statements are myths. Every woman is different.
It's true that most women will have cycles that are around 28 days. But, a woman can be healthy and normal and have just 3 or 4 cycles a year. [However, while variations might be healthy and normal, they could also be a sign of a serious underlying problem. For example, a recent news article suggested that irregular menstrual cycles may predict Type 2 Diabetes.]
Ovulation occurs about 14-16 days before women have their period (not 14 days after the start of their period). The second half of the cycle, ovulation to menstruation, is fairly consistently the same length, but the first part changes from person to person and from cycle to cycle. In rare cases, a women may ovulate twice in a month, once from each ovary.
Conception/Fertilization of an egg, can only occur after ovulation. The egg stays alive for about 24 hours once released from the ovary. Sperm can stay alive inside a woman's body for 3-4 days, but possibly as long as 6-7 days. If a couple has intercourse before or after ovulation occurs, they can get pregnant, since the live sperm are already inside the woman's body when ovulation occurs. Thus a woman can become pregnant from intercourse for about 7-10 days in the middle of her cycle.
from:
(www.feministwomenshealth.org)