The Visible Embryo Pregnancy Calculator

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Menstruation - "menstruation" and "menses", from Latin "mensis" meaning "month".

Luteal phase - Following ovulation of an egg, the follicle which surrounded that egg becomes the corpus luteum, a group of cells, capillaries and connective tissue with a life span of about 14 days. During those 14 days, the corpus luteum triggers the production of the hormone progesterone which stimulates the endometrium to prepare for a blastocyst to implant. If the blastocyst does not implant, progesterone levels drop and menstruation occurs.
Moon photo Courtesy NASA/JPL-Caltech

Visible Embryo Pregnancy Calculator

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