Progesterone only pill: Difference between revisions
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The progesterone only oral contraceptive pill (minipill) contains [[progesterone|progesterone]] but unlike the combined pill it does not contain [[oestrogen|oestrogen]]. When produced naturally, progesterone renders the [[endometrium|endometrium]] suitable for implanting of a fertilized [[ovum|ovum]] and inhibits further release of [[GRH|GRH]], [[FSH|FSH]], and [[LH|LH]] so regulates [[Menstrual_cycle|cycle]] and [[ovulation|ovulation]]. If no fertilization takes place the [[corpus luteum|corpus luteum]] regresses and progesterone levels drop so the endometrium cannot be maintained and [[menstruation|menstruation]] occurs. Lack of progesterone also means the clamp on GRH, FSH and LH secretion is released. | |||
The progesterone only pill is mainly effective due to | The progesterone only pill is mainly effective due to its effect on [[Cervix|cervical]] mucus, it doesn't actually stop ovulation. | ||
If taken regularly it can cause irregular periods and it is considered less effective than the combined pill. | If taken regularly it can cause irregular periods and it is considered less effective than the combined pill. | ||
It is said to have a number of side effects including: | It is said to have a number of side effects including: | ||
*weight gain | *weight gain | ||
*mild nausea | *mild nausea | ||
*skin changes e.g. acne | *skin changes e.g. acne | ||
*blood clots | *blood clots | ||
*depression | *depression | ||
*cancer | *cancer | ||
Latest revision as of 18:49, 23 October 2017
The progesterone only oral contraceptive pill (minipill) contains progesterone but unlike the combined pill it does not contain oestrogen. When produced naturally, progesterone renders the endometrium suitable for implanting of a fertilized ovum and inhibits further release of GRH, FSH, and LH so regulates cycle and ovulation. If no fertilization takes place the corpus luteum regresses and progesterone levels drop so the endometrium cannot be maintained and menstruation occurs. Lack of progesterone also means the clamp on GRH, FSH and LH secretion is released.
The progesterone only pill is mainly effective due to its effect on cervical mucus, it doesn't actually stop ovulation.
If taken regularly it can cause irregular periods and it is considered less effective than the combined pill.
It is said to have a number of side effects including:
- weight gain
- mild nausea
- skin changes e.g. acne
- blood clots
- depression
- cancer