Skip to main content

Female sex hormones



The most important hormones made by the ovaries are known as female sex hormones (sex steroids) – and the two main ones are oestrogen and progesterone. The ovaries also produce some of the male hormone, testosterone.
During puberty, oestrogen stimulates breast development and causes the vagina, uterus (womb) and Fallopian tubes (that carry eggs to the womb) to mature.
It also plays a role in the growth spurt and alters the distribution of fat on a girl's body, typically resulting in more being deposited around the hips, buttocks and thighs. Testosterone helps to promote muscle and bone growth.
From puberty onwards, LH, FSH, oestrogen and progesterone all play a vital part in regulating a woman's menstrual cycle, which results in her periods.
Each individual hormone follows its own pattern, rising and falling at different points in the cycle, but together they produce a predictable chain of events.
One egg (out of several hundred thousands in each ovary) becomes 'ripe' (mature) and is released from the ovary to begin its journey down the Fallopian tube and into the womb.
If that egg isn't fertilised, the levels of oestrogen and progesterone produced by the ovary begin to fall. Without the supporting action of these hormones, the lining of the womb, which is full of blood, is shed, resulting in a period.

Comments

  1. Anonymous4 June 2012 at 07:36

    This is the perfect site for anyone who really wants to
    understand this topic. You understand so much its almost hard to argue with you (not
    that I actually will need to?HaHa). You certainly put a new spin on a topic which has been written about for ages.
    Wonderful stuff, just excellent!
    Feel free to surf my weblog : video porno gratuite

    ReplyDelete
  2. Iamstillawoman4 June 2012 at 22:00

    This comment has been removed by the author.

    ReplyDelete
    Replies
    1. Iamstillawoman4 June 2012 at 22:09

      This comment has been removed by the author.

      Delete

Post a Comment

Popular posts from this blog

"Hard nipples" - areola or nipple skin

Someone once wrote"... when i get really cold, or get goosebumbs all over my body, the whole things really scrunch up, like, my entire areola scrunches itself up into a wrinkled little mound. it looks really weird and ugly, and i haven't ever seen other people's breasts do it. what is wrong with my areola/nipples??" The answer: Well nothing is wrong. This is what my areola does too. It's a normal reaction to the coldness or to irritation / stimulation. The little muscles in the areola do a similar goosebump thing as your other skin can do. People often call this phenomenon "hard nipples". Also note that skin on areola has less feeling or sensation to it than other areas of your body. If the areola was very sensitive, then breastfeeding would probably be quite uncomfortable because the baby pulls and tugs it! The nipples are sensitive but the sensitivity changes with hormonal changes, such as occur at mestrual cycle or pregnancy. Also this v...
8 comments
Read more

Kate Jackson Breast Cancer a flash back

THE MOST MOMENTOUS CHANGE IN Kate Jackson's life began early one morning in January 1987, during her fourth season on the hit TV series Scarecrow and Mrs. King. After a phone call informed her that the show's taping was canceled because costar Bruce Boxleitner had the flu, Jackson went back to sleep. When she woke several hours later, "It was out of the blue, but perfectly clear," she recalls. "I sat up in bed and literally said, 'You have to have a mammogram.' " She did, and two days later a biopsy confirmed her vague fears: A minute growth found in her left breast was determined to be malignant. "I was forced to face, squared up, my own mortality," says Jackson. "I had to decide whether I wanted to live or to die. And if you choose life, as I did, it's never the same." For three TV seasons 16 years ago, she was famous as Sabrina Duncan, a girl-next-door gone glamorous and the character critics dubbed the brainiest o...
Post a Comment
Read more

The four stages of breast development

In Stage 1 shows the flat breasts of childhood. By Stage 2, breast buds are formed as milk ducts and fat tissue develop. In Stage 3, the breast become round and full, and the areola darkens. Stage 4 shows fully mature breasts. (Illustration by GGS Information Services.) period begins. Usually these signs are accompanied by the appearance of pubic hair and hair under the arms. Once ovulation and  menstruation  begin, the maturing of the breasts begins with the formation of secretory glands at the end of the milk ducts. The breasts and duct system continue to grow and mature with the development of many glands and lobules. The rate at which breasts grow varies significantly and is different for each young woman. Breast development occurs in five stages: Stage One: In preadolescence, the breasts are flat and only the tip of the nipple is raised. Stage Two: Buds appear, breast and nipple are raised, fat tissue begins to form and the areola (dark area of skin that ...
1 comment
Read more