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Days 1-5: Menstruation

During menstruation, your body realizes that the egg from the previous cycle did not fertilize or implant. The estrogen and progesterone hormone levels will begin to drop causing the lining of the uterus, called the endometrium, to shed and bleed through the cervix and vagina. This bleeding lasts an average of five days and consists of blood, mucus, and tissue.

The first day of menstrual flow is considered the first day of the next menstrual cycle. During this menstrual phase, your pituitary gland produces a hormone called FSH (Follicle Stimulating Hormone). This hormone level rises and triggers the next phase in the menstrual cycle where your body begins to prepare for another reproductive cycle.

Comments (8)

Hi Jessica,

I would recommend using ovulation prediction tests to determine when you are ovulating. Technically, you can ovulate any time after your menses, though it is most likely that you will ovulate after day 10 sometime. Good luck!


If you are concerned about your period, my recommendation is to visit with your OB/GYN and discuss your concerns. Best of luck!

I used to menstrate for 5 days but dis month it only came 1 day and am not pregnant too .what is wrong with me? Is it normal?. Pls I need a reply

If your period is irregular and you are trying to get pregnant, you really should see a fertility doctor who can evaluate your individual situation. Our Patient Care Advocates can help you find a fertility doctor: 855-955-2229 or Best, Claire

i just got my period yesterday n i wanted to know when is the best time for me n man my to get pregnant

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