Ayesha Siddiqa
Badges: 1
Rep:
?
#1
Report Thread starter 5 months ago
#1
What are the phases of menstrual cycle?
0
reply
theoneyoulove
Badges: 18
Rep:
?
#2
Report 5 months ago
#2
The female reproductive system includes a cycle of events called the menstrual cycle. It lasts about 28 days, but it can be slightly less or more than this. The cycle stops while a woman is pregnant. These are the main features of the menstrual cycle:

The start of the cycle, day 1, is when bleeding from the vagina begins. This is caused by the loss of the lining of the uterus, with a little blood. This is called menstruation or having a period.
By the end of about day 5, the loss of blood stops. The lining of the uterus begins to re-grow and an egg cell starts to mature in one of the ovaries.
At about day 14, the mature egg cell is released from the ovary. This is called ovulation. The egg cell travels through the oviduct towards the uterus.
If the egg cell does not meet with a sperm cell in the oviduct, the lining of the uterus begins to break down and the cycle repeats.
2
reply
macpatgh-Sheldon
Badges: 20
Rep:
?
#3
Report 5 months ago
#3
Just to add a little meat to "the one somebody loves"'s answer, which is admirable and accurate!

The female sex hormones play a vital role in the above cycle. Oestradiol [most potent oestrogen] stimulates growth of the sex organs and maturation of the ovarian follicle, so its level rises before ovulation - this triggers the release of LH [luteinizing hormone] via gonadotrophin release from the pituitary, and LH stimulates ovulation. Once this is done, oestrogen levels drop greatly [its job is complete for this cycle].

The vagina is friendly to spermatozoa around the time of ovulation, for obvious reasons.
M.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Should the school day be extended to help students catch up?

Yes (27)
27.27%
No (72)
72.73%

Watched Threads

View All