Navigation Links
Do birth control pills cause weight gain? New research says no

PORTLAND, Ore. According to research conducted at the Oregon National Primate Research Center at Oregon Health & Science University, the commonly held belief that oral contraceptives cause weight gain appears to be false. The results of the study are published online and will appear in next month's edition of the journal Human Reproduction.

"A simple Google search will reveal that contraceptives and the possibility that they may cause weight gain is a very highly debated topic," said Alison Edelman, M.D., a physician and researcher in the Department of Obstetrics and Gynecology at OHSU and lead author of the study.

"Issues surrounding weight are hard to study in humans, and the research thus far has been insufficient to demonstrate whether or not oral contraceptives cause weight gain or loss. But this is an extremely important question as concern about weight gain is one of the main reasons why women may avoid or discontinue birth control, which in turn places them at greater risk for an unplanned pregnancy."

To conduct their research, scientists and physicians studied a group of rhesus macaque monkeys at the OHSU Oregon National Primate Research Center for almost a year. Rhesus monkeys were used in this study because their reproductive system is nearly identical to humans. However, unlike human studies, more variables can be controlled and measured such as exact food intake - to provide more meaningful data.

At the beginning of the study, half the animals were obese and half were normal weight. During the eight-month treatment period, animals received doses of oral contraceptives, adjusted to the weight of the animals so that it mimicked dosage in humans. Researchers tracked weight, food intake, activity levels, body fat and lean muscle mass. At the study's conclusion, the normal weight group remained weight stable whereas the obese group lost a significant amount of weight (8.5%) and percent of body fat (12%) due to an increase in basal metabolic rate. No changes were seen in food intake, activity or lean muscle mass for either group.

"This study suggests that worries about weight gain with pill use appear to be based more on fiction than on fact," said Judy Cameron, Ph.D., senior author of the paper and a researcher at the primate center.

"Additionally, there may be a differential affect depending on your starting weight heavier individuals who keep their diet stable may see a weight loss with pill use. Most likely, the reason why this belief continues to exist is that the weight gain that seems to occur with age is being attributed to these medications. We realize that research in nonhuman primates cannot entirely dismiss the connection between contraceptives and weight gain in humans, but it strongly suggests that women should not be as worried as they previously were."


Contact: Jim Newman
Oregon Health & Science University

Related medicine news :

1. True Signs of Autism May Not Appear Until 1st Birthday
2. UAB-led study shows simple steps could reduce stillbirths by up to 1 million
3. March of Dimes Provides $2.6 Million in New Funding for Preterm Birth Research
4. Experts call for acceleration of research and interventions for prematurity and stillbirth
5. Black Women at Higher Risk of Birth-Related Heart Problem
6. HIV drug that protects a fetus should be avoided for one year after childbirth, researchers say
7. Successful treatment of periodontal disease lowered preterm birth incidences
8. Improving care for low-birth-weight infants
9. Treating Gum Disease May Thwart Preterm Births
10. Ford CEO Asks Nation to March to Prevent Preterm Birth
11. Amnesty International Urges Congress to Turn Attention to Needed Reforms on Maternal and Childbirth Care
Post Your Comments:
(Date:12/1/2015)... ... 2015 , ... CloudLIMS today announced that it is the ... the New Products and Services category for its innovative product offering, BioTracer. ... that helps labs organize data and track samples with storage inventories. BioTracer's SaaS ...
(Date:12/1/2015)... ... December 01, 2015 , ... Diabetic foot ... States. Podiatrists are well aware that psychology-based patient non-compliance (disobedience of a health ... contributors to diseases of the diabetic foot. The American Board of Multiple ...
(Date:12/1/2015)... IL (PRWEB) , ... December 01, 2015 , ... ... keeping their independence is everything. That is why Hollister Incorporated has launched the ... to offer this next product in the VaPro touch free catheter portfolio,” said ...
(Date:12/1/2015)... ... December 01, 2015 , ... ... has been selected as a finalist in this year’s Fierce Innovation Awards: Healthcare ... IT Healthcare was recognized as a finalist in the category of Digital Solutions ...
(Date:12/1/2015)... ... 2015 , ... TCS Healthcare Technologies (TCS), a leading provider ... is pleased to announce that VIP Care Services, a Caprock Health Group affiliate ... Complete Care™ Management to back their collaborative catastrophic case management initiatives. ACUITY Complete ...
Breaking Medicine News(10 mins):
(Date:12/1/2015)... 2015 /PRNewswire/ -- Royal Philips  (NYSE: ... X-ray imaging software that produces high-contrast images for all ... a grid, at the 2015 Radiological Society of ... is Philips, first digital imaging solution providing grid-like contrast ... clinician,s workflow and supports "first-time-right imaging" by decreasing the ...
(Date:12/1/2015)... PUNE, India , December 1, 2015 ... new market research report "Immunotherapy Drugs Market by Type of ... Vaccines), Checkpoint Inhibitors), Epidemiology, Regulatory and Pipeline Analysis - Global ... Market is poised to reach USD 73,529.2 Million by 2020 ... 12.8% from 2015 to 2020. Browse ...
(Date:12/1/2015)... MASON, Ohio , Dec. 1, 2015 /PRNewswire/ ... enhancement to its GeneSight® Psychotropic test giving healthcare providers ... make medication decisions for patients suffering from depression, ... and other behavioral health conditions. ...   --> With the addition of ...
Breaking Medicine Technology: