The combination pill works in several ways to prevent pregnancy, the most important of which is preventing ovulation. Occasionally, though, ovulation may still occur, so the pill also thickens your cervical mucus to keep sperm from entering your womb, and thinning the womb lining so the fertilized egg can't implant.
If you are on a combination (estrogen and progesterone) pill, it works by preventing ovulation (no egg, no fertilization, no baby) If you are on a progesterone only pill you still ovulate but other changes in your body prevent sperm from getting to the egg. In either case you still have a period because your body continues to produce and shed the lining that would nurture the fertilized egg if it were present.
If you are not on the pill, each month your brain tells your ovary to release an egg. After it has been released, the hormone levels in your body go up, which make the brain stop "telling" the ovary to release an egg (otherwise you'd just keep ovulating)
When you are on the pill, the hormones in it make your brain think you have already ovulated. So your brain doesnt tell your ovaries to release an egg.
However, occasionally, a woman might have a 'Breakthrough" ovulation while on the pill. This is why the pill also works by changing the cervical mucus--to make it hard for sperm to get throuh, in case you have a breakthrough ovulation.
Hope that helps! :)
The previous is not accurate. The reason ovulation occurs is by a 20 fold increase in estrogen. This causes a positive feedback, causing the pituitary (brain) to release LH which causes ovulation.
Here is the basic principle. First the ovary begins to develop a primary oocyte, (FSH does this). As this occurs (days 1-13 of the menstrual cycle) these cells divide more and more forming a mass of cells called granulosa cells. ALL of these cells release estrogen. as more cells divide estrogen levels go up.
Once a 20 fold increase in estrogen occurs the Pitutary (brain) releases LH. This causes ovulation. As the oocyte brakes through the ovary it enters the uterine tube. The granulosa cells (secreate estrogen) CHANGE into the coupus luteum. Now these cells start making and secreating Progesterone. Progesterone causes the endometrium (site of implantation) to add more blood vessles and glucose (actualy called glycocalx). This will provide the egg food (glucose) and nutirents/oxogen (blood vessels).
Current research suggest that PMS is caused by this rapid change in hormomes, after ovulation. (Drop in estrogen, increase then drop in progesterone)
Finally, the "tricking your body that you are pregnant" when on birth control. If you were pregnant your body would maintian a low to medium level of estrogen because the fertilized egg would be secreating estorgen and hCG (human chorionic gonadotrophen). This keeps the courpus leuteum working, AND prevents the ovary from making another fallicle to fertilize (supresses FSH or Falicle stimuating hormone). When you are on the pill. You maintain this low level of estrogen (sometimes with progesterone) and your body never reaches the 20 fold increase in estrogen that will cause ovulation.
Bottome line: No egg is matured and developed (supress FSH), No ovulation (No LH), and no chance of a baby. The progesterone only birth control is correct above. As it preps the endometrium for implantation it increases the thickness of the mucus. Normally, 200-300 million sperm (spermatazoa) enter the vagina, and only 300-500 reach the site of ovulation, and only 1 breaks into the egg to fertilize it. SO the odds are already bad. Make the mucus extreamly thicker, and none of the sperm will make it up to the site of fertilization.
Birth control pills stop you getting pregnant ---- Birth control actually can help you get pregnant. If you have abnormal periods, you'll have abnormal ovulation making it difficult to get pregnant. Birth Control helps regulate periods, therefore regulating Ovulation making it easier to get pregnant if you mess them up.
How do you get 1000000 robux for free?
A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement?
What is pokediger1s password on roblox?
What is Louis Tomlinson's IQ?
How many people signed the Declaration of Independence on July 4 1776?
Which way should you set your ceiling fan to turn - in the summer and in the winter?
How many kids did Alexander Hamilton have?
Does jimmy and Michelle capps have any children together?
What is modal fabric??
What were George Washingtons false teeth made from?
Who was Yale University named after?
What determines whether you are left or right handed?
What would you do if the internet was suddenly gone?
What is the longest plate appearance in MLB history?
What is the official name of the Statue of Liberty?
Why can't we remember our dreams?
Which of Congress's powers is implied through the necessary and proper clause?
Which 2 London Underground stations have no letters in common with breakfast?
Is child singer Kim Sol Mae dead?
What is the national local and organisational agreed ways of working for advance care planning?
Where is elisa boyer today?
Accountancy is necessary while auditing is a luxury comment?
Why was James Cagney estranged from his children?
Why a variable-pitch rack and pinion system is sometimes used?
Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.