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    Contraceptive pills work by reducing the amount of FSH and LH released by the pituitary so you would expect lower amounts of these two hormones in women taking the pill. But how would the pill affect the concentration of oestrogen and progesterone differ in women?

    Any help would be much appreciated.
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    (Original post by Keira Larkin)
    Contraceptive pills work by reducing the amount of FSH and LH released by the pituitary so you would expect lower amounts of these two hormones in women taking the pill. But how would the pill affect the concentration of oestrogen and progesterone differ in women?

    Any help would be much appreciated.
    The combined contraceptive pill contains both oestrogen and progesterone. These high levels of oestrogen and progesterone reduce the amount of LH and FSH from the anterior pituitary via negative feedback. Normally, the combined pill is taken for 21 days followed by 7 days of not taking the pill during which the woman has a 'withdrawal bleed' due to the fall in levels of progesterone. However, there is also the progestogen-only pill. This pill is taken every day, and progesterone levels are constantly high. The high levels of progesterone negatively feedback on the anterior pituitary which suppresses the release of LH and FSH.
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    (Original post by Jpw1097)
    The combined contraceptive pill contains both oestrogen and progesterone. These high levels of oestrogen and progesterone reduce the amount of LH and FSH from the anterior pituitary via negative feedback. Normally, the combined pill is taken for 21 days followed by 7 days of not taking the pill during which the woman has a 'withdrawal bleed' due to the fall in levels of progesterone. However, there is also the progestogen-only pill. This pill is taken every day, and progesterone levels are constantly high. The high levels of progesterone negatively feedback on the anterior pituitary which suppresses the release of LH and FSH.
    Thank you very much
 
 
 
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