Featured Research

from universities, journals, and other organizations

Continuous Oral Contraceptives Better At Easing Pain, Bleeding, Study Shows

Date:
April 7, 2008
Source:
Penn State
Summary:
Continuous oral contraceptives may be more effective than the standard 28-day birth control pills in suppressing the ovary, according to researchers. They say that the continuous pill also causes a significant improvement in pain and behavioral changes.

Continuous oral contraceptives may be more effective than the standard 28-day birth control pills in suppressing the ovary, according to researchers. They say that the continuous pill also causes a significant improvement in pain and behavioral changes.

Related Articles


"We have provided a biological proof of concept that both the ovary and the lining of the uterus are suppressed better and quicker with the continuous pill than with the cyclic pill. And there is no harmful effect on the lining of the uterus either," said Richard Legro, M.D., professor of obstetrics and gynecology, Penn State College of Medicine and lead author of the study.

Standard 28-day birth control pills mimic a woman's natural menstrual cycle, while preventing pregnancy. A standard dose includes 21 hormone pills to suppress growth in the endometrium, the lining of the uterus, and seven placeholder placebo pills.

Continuous oral contraceptives may be more effective in treating several medical conditions, where continuous ovarian suppression is desired, such as acne, hirsutism, premenstrual syndrome, endometriosis and polycystic ovary syndrome. But there have been few detailed studies of ovarian function on the pill to demonstrate this effect.

Legro and his colleagues compared the effectiveness of continuous oral contraceptives with that of the cyclical pills. The researchers monitored 62 healthy women, randomly assigned to receive either cyclical or continuous birth control pills, for six months with both researchers and participants blinded to the study group.

"We monitored vaginal bleeding, quality of life, and ovarian and endometrial suppression," said Legro, whose team's findings appeared in a recent issue of the Journal of Clinical Endocrinology and Metabolism.

The researchers found a significant decrease in moderate to heavy bleeding days among women who received the continuous birth control regimen. Women in the continuous group also had a significant decline in circulating and urinary estrogen levels, total ovarian volume and lead follicle size -- all biomarkers that indicate the ovary is less active -- and reported less pain and behavioral changes compared to women in the cyclic group.

However, results from the study also indicate greater breakthrough bleeding, or spotting, among women in the continuous group. Legro says that while greater breakthrough bleeding may be a truly objectionable side effect for many women, it does not seem to affect their quality of life.

"That is one of the unique things of this study. The quality of life did not necessarily decrease as it was counterbalanced by improvements in other areas such as pain and mood swings," the Penn State researcher added.

According to Legro, the study suggests that there may be diverse mechanisms of breakthrough bleeding depending on whether a woman is using either a cyclical or continuous regimen of birth control pills.

In the case of cyclic pills, the ovary comes back into the equation during the pill free interval leading to a rebound increased secretion of ovarian hormones, which in turn contributes to some breakthrough bleeding, he explained.

"Breakthrough bleeding in the continuous group, in our opinion, is most likely due to the fact that the pill does too good of a job in suppressing the ovary and the lining of the uterus gets a little bit thin and fragile so that from time to time there is a little bit of bleeding," added Legro, whose work is funded by the National Institutes of Health.

The study provides a physical reason for continuous oral contraceptive pills to treat such chronic medical conditions such as polycystic ovary syndrome, endometriosis and premenstrual syndrome, where additional suppression of the ovary or the endometrium is desired, and Legro noted that other chronic conditions such as hypertension or diabetes are treated continuously, not three weeks out of four. Further studies showing a favorable risk benefit ratio of continuous oral contraceptives on these disorders are the next step.

Other researchers on the paper are Jaimey G. Pauli, M.D.; Allen R. Kunselman, senior research assistant; Richard J. Zaino, M.D., professor of anatomic pathology; Laurence M. Demers, M.D., distinguished professor emeritus; Carol L. Gnatuk, M.D.; and William C. Dodson, M.D., all at Penn State College of Medicine; and Juliana W. Meadows, Ph.D., and James Kesner, Ph.D., both at the National Institute for Occupational Safety and Health, Cincinnati, Ohio.


Story Source:

The above story is based on materials provided by Penn State. Note: Materials may be edited for content and length.


Cite This Page:

Penn State. "Continuous Oral Contraceptives Better At Easing Pain, Bleeding, Study Shows." ScienceDaily. ScienceDaily, 7 April 2008. <www.sciencedaily.com/releases/2008/04/080403133905.htm>.
Penn State. (2008, April 7). Continuous Oral Contraceptives Better At Easing Pain, Bleeding, Study Shows. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2008/04/080403133905.htm
Penn State. "Continuous Oral Contraceptives Better At Easing Pain, Bleeding, Study Shows." ScienceDaily. www.sciencedaily.com/releases/2008/04/080403133905.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Kids Die While Under Protective Services

Kids Die While Under Protective Services

AP (Dec. 18, 2014) As part of a six-month investigation of child maltreatment deaths, the AP found that hundreds of deaths from horrific abuse and neglect could have been prevented. AP's Haven Daley reports. (Dec. 18) Video provided by AP
Powered by NewsLook.com
Dads-To-Be Also Experience Hormone Changes During Pregnancy

Dads-To-Be Also Experience Hormone Changes During Pregnancy

Newsy (Dec. 18, 2014) A study from University of Michigan researchers found that expectant fathers see a decrease in testosterone as the baby's birth draws near. Video provided by Newsy
Powered by NewsLook.com
Prenatal Exposure To Pollution Might Increase Autism Risk

Prenatal Exposure To Pollution Might Increase Autism Risk

Newsy (Dec. 18, 2014) Harvard researchers found children whose mothers were exposed to high pollution levels in the third trimester were twice as likely to develop autism. Video provided by Newsy
Powered by NewsLook.com
UN: Up to One Million Facing Hunger in Ebola-Hit Countries

UN: Up to One Million Facing Hunger in Ebola-Hit Countries

AFP (Dec. 17, 2014) Border closures, quarantines and crop losses in West African nations battling the Ebola virus could lead to as many as one million people going hungry, UN food agencies said on Wednesday. Duration: 00:52 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins