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The four phases of the menstrual cycle include:
- Menstrual phase: when uterine lining sheds.
- Follicular phase: when eggs begin to mature.
- Ovulation phase: when an egg is released from the ovary.
- Luteal phase: when uterine lining builds-up.
Wiki User
∙ 9y ago
Wiki User
∙ 12y agoHi, so this is what I've revised so far for negative feedback and specifically the human oestrous cycle for my summer exams.Okay, so the female human oestrous cycle lasts on average around 28 days.
From day 1-5, the lining of the uterus starts to break down. The pituitary gland releases FSH ( follicle stimulating hormone), this hormone stimulates the follicles in the ovaries to grow and mature. As they do so, they release small amounts of oestrogen which causes the lining of the uterus to slowly rebuild. Meanwhile these small amounts of oestrogen inhibits the release of FSH from the pituitary gland (negative feedback).
At around day 10, the levels of oestrogen reach a critical peak, this level stimulates the pituitary gland to release( positive feedback) FSH and LH ( luteinising hormone). This surge in LH causes the follicles in the ovaries to release an egg at around day 14, this is ovulation.
This surge in LH also causes the follicles to mature into a structure known as the corpus luteum, this structure releases small amounts of oestrogen and large amounts of progesterone. This helps maintain the uterus lining and also inhibits the release of LH and FSH from the pituitary gland.( negative feedback)
If fertilisation does not occur the corpus luteum degenerates, hence the levels of progesterone decreases and so the secretion of FSH and LH into the blood is no longer inhibited and so the lining begins to break down and the cycle starts to repeat itself. Back to day 1.
Wiki User
∙ 9y agoThe four stages of the menstrual cycle includes:
- Menstruation: when the uterine lining sheds ready for the new cycle.
- Follicular phase: when the ovum in the ovary matures ready for ovulation.
- Ovulation: when a mature egg is released from the ovary.
- Luteal/proliferate phase: uterine lining build-up ready for potential pregnancy.
Wiki User
∙ 13y agoAngry, Happy, Sad, Ecstatic
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Which is not one of the four stages in the menstrual cycle ovulation menstruation fertilization stage resting phase?
Your mother
The menstrual cycle has how many stages?
28 days
What are the the distinct stages of menstrual cycle?
The phases of the menstrual cycle include:Menstrual phase: when uterus lining sheds.Follicular phase: when eggs begin to mature in the ovary.Ovulation phase: when eggs are released from the ovary.Luteal phase: when the uterus lining plumps up.
Can four B12 injection make your menstrual cycle late?
Four B12 shots usually will not cause your menstrual cycle to be late. Your cycle can be late if your body is low in vitamin B12. You should talk with your doctor and ask him why your menstrual cycle would be late
What are the four type of water cycle?
the four stages of water cycle are:EvaporationCondensationPrecipitationCollection
What are The stages of the menstrual cycle in a human female using diagrams and captions?
female and mail
The wall of this structure breaks down during one of the stages of the menstrual cycle?
uterus
How many stages does the eukaryotic cell cycle have?
it has four
Does mosquito have a three stages of life cycle?
No,they have four
What are the four types of water cycle stages?
They areCondensation,Precipitation,Evaporation, andAccumulation.
How do you know when a woman is on her menstrual cycle?
The menstrual cycle is the reproductive cycle, as long as she is fertile she is always on her menstrual cycle. You can't tell where she is in her menstrual cycle unless she tells you.
What happens during each of the four phases of the menstrual cycle?
u bleed
