Saturday 23 February 2013

3.9 understand the roles of oestrogen and progesterone in the menstrual cycle

The menstrual cycle
Oestrogen and progesterone are both hormones which effect the menstrual cycle.
Oestrogen: produced in the ovaries; thickens the womb lining; prompts the release of LH.
Progesterone: produced in the corpus lutiem; maintains the lining of the womb

8 comments:

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    1. Did you find out? I'm confused too.

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    3. Luteinizing hormone
      an acute rise of LH triggers ovulation and development of the corpus luteum

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  3. The Biology Syllabus has changed…

    Here is a New blog for the 2017 Syllabus:

    http://igcse-biology-2017.blogspot.hk

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  4. more at

    http://igcse-biology-notes.blogspot.hk/2017/06/39-understand-roles-of-oestrogen-and.html

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