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FSH, estrogen and LH and progesterone in menstrual cycle

Describe the event which marks the start of the menstrual cycle? Also give details of blood concentration of FSH, estrogen and LH and progesterone within this stage of cycle?

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By principle the menstrual cycle starts at the day when menses begins. (Menses is endometrial hemorrhage excreted via the vaginal canal.) At these days the hormones FSH, LH, progesterone and estrogens are in distilled.

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