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The x-axis shows the time of the menstrual cycle in days. The time scale starts with the beginning (or "onset") of (last) menstrual period (LMP), given as day number. Day number 1 corresponds to 0 to 0.99 days from LMP, and Day number 2 corresponds to 1.00 to 1.99 days from LMP and so forth.
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This image is a derivative work of the following images: File:MenstrualCycle_en.svg licensed with Cc-by-sa-2.5, Cc-by-sa-3.0-migrated, GFDL 2011-02-25T14:24:59Z A7N8X 580x775 (67158 Bytes) Reverted to version as of 20:29, 23 March 2008 more common and more detailed version
Date/Time Thumbnail Dimensions User Comment; current: 05:38, 23 August 2010: 430 × 420 (155 KB): Begoon: Move data point on basal temperature graph as requested in Graphic Lab Illustration Workshop
The sole manufacturer is a US for-profit company, Cycle Technologies [1]. The Standard Days Method is based on the fact that there is a fertile window during a woman's menstrual cycle which begins several days before ovulation and ends a few hours after ovulation. During this time a woman can become pregnant.
The first day of red bleeding is considered day one of the menstrual cycle. To use these methods, a woman is required to know the length of her menstrual cycles. Imperfect use of calendar-based methods would consist of not correctly tracking the length of the woman's cycles, thus using the wrong numbers in the formula, or of having unprotected ...
Calendar rules may set a standard number of days, specifying that (depending on a woman's past cycle lengths) the first three to six days of each menstrual cycle are considered infertile. [31] Or, a calendar rule may require calculation, for example holding that the length of the pre-ovulatory infertile phase is equal to the length of a woman's ...
FSH secretion begins to rise in the last few days of the previous menstrual cycle, [3] and is the highest and most important during the first week of the follicular phase [4] (Figure 1). The rise in FSH levels recruits five to seven tertiary-stage ovarian follicles (this stage follicle is also known as a Graafian follicle or antral follicle ...