English Simple Brass Microscope (circa 1835)


Galleria
License Info
Image Use
Custom Photos
Partners
Site Info
Contact Us
Publications
Home

The Galleries:

Photo Gallery
Silicon Zoo
Pharmaceuticals
Chip Shots
Phytochemicals
DNA Gallery
Microscapes
Vitamins
Amino Acids
Birthstones
Religion Collection
Pesticides
BeerShots
Cocktail Collection
Screen Savers
Win Wallpaper
Mac Wallpaper
Movie Gallery
 

Loes Modderman

Progesterone

Progesterone is a steroidal hormone that plays a central role in the female reproductive cycle. The sex hormone is produced primarily by the adrenal glands, the placenta, and the corpus luteum of the ovary. In the absence of oocyte fertilization, progesterone levels decrease, and menstruation occurs. However, if the egg should happen to become fertilized, progesterone levels will increase to help maintain pregnancy and promote mammary gland development.

Progesterone

Naturally occurring progesterone aids glucose metabolism, and facilitates the formation of healthy bones. In additional, synthetic derivatives of this hormone are prescribed for birth control purposes, as well as to alleviate various difficulties associated with menopause. With hormone replacement therapy, progesterone (or progestins, as the synthetic forms are commonly called) helps reduce the risk of endometrial cancer inherent in estrogen therapy. However, blood clots, various cardiovascular disorders, and decreased high-density lipoprotein (HDL) levels have also been conditions associated with progestin administration. Prescribing the hormone in lower doses has reportedly helped reduce such risks.

BACK TO LOES MODDERMAN GALLERY

Questions or comments? Send us an email.
Photomicrographs are © 2000-2013 by Loes Modderman.
All Rights Reserved under copyright law.
© 1995-2013 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Friday, Aug 01, 2003 at 11:42 AM
Access Count Since February 15, 2002: 8721
Microscopes provided by:
Visit the Nikon website. Visit the Olympus Microscopy Resource Center website.