Featured Research

from universities, journals, and other organizations

Season Of Birth Influences Age Of Menopause, Say Italian Researchers

Date:
May 13, 2005
Source:
European Society For Human Reproduction And Embryology
Summary:
Research by Italian experts on the menopause has found that that the month and the season in which a woman is born influence the age at which she reaches menopause.

Research by Italian experts on the menopause has found that that the month and the season in which a woman is born influence the age at which she reaches menopause.

A study of nearly 3,000 post-menopausal women showed that the earliest age of menopause was found in women born in March and the latest among those born in October. On average there was around 15 months' difference, with women born in October reaching menopause at over 50 years compared with under 49 years for women born in March.

Writing in Europe's leading reproductive medicine journal Human Reproduction, lead author Dr Angelo Cagnacci said that the findings reinforced the concept that prenatal environmental factors affected a baby's adult life.

"Mothers should be aware of this, considering that during pregnancy they are going to influence, not only the health of the newborn, but also the health and reproductive life of their child during adulthood," he said.

The study, at four university hospitals (Bologna, Ferrara, Modena and Parma), was carried out on 2,822 women who were at least a year past the menopause. It found that the mean age of menopause was 49.42 -- 49.04 for spring-born women and 49.97 for autumn-born women.

Dr Cagnacci, associate professor of Obstetrics and Gynaecology at the University of Modena, said that they had controlled for factors likely to interfere significantly with the findings, such as age of menarche, weight, smoking etc., and independently of all these factors the age at menopause was conditioned by the season of birth.

He conceded that there were some limitations to the study -- a possibility of recall bias, and it involved women referred to menopause centres rather than the general population. Also, the effect of seasons may differ in different geographic areas.

"Nevertheless, the data seem to suggest notable effects of the month/season of birth on the length of a woman's fertile life, further supporting a role for environmental factors in regulating adult reproductive life and the timing of its termination."

It was not known which seasonal environmental factors were capable of influencing timing of menopause via an action exerted before birth, or even before conception. The study speculated that modifications of environmental temperature and sunlight may influence foetal growth and therefore future reproductive capabilities; seasonally linked diet modifications or exposure to infections were other possibilities. Before conception, seasonal environmental factors influencing ooctye maturation may contribute to the development of defective embryos and weak adults.

"Our present data seem to indicate that women born in autumn develop better during their prenatal life and are born with a higher number of oocytes than women born in spring," said Dr Cagnacci. "An alternative explanation may be that early mortality is highest among children born in autumn, thus selecting the fittest for survival, although other studies do not support this hypothesis."

He said the researchers' view was that a prolonged reproductive period with a later menopause was an index of higher embryo quality and ultimately, their quality was passed on to their offspring.

The next phase of the research was seeing whether the season of birth of the women in the study influenced their psychological profile -- affecting their susceptibility to conditions such as anxiety and depression, for example. "Results so far seem promising," he said.



Story Source:

The above story is based on materials provided by European Society For Human Reproduction And Embryology. Note: Materials may be edited for content and length.


Cite This Page:

European Society For Human Reproduction And Embryology. "Season Of Birth Influences Age Of Menopause, Say Italian Researchers." ScienceDaily. ScienceDaily, 13 May 2005. <www.sciencedaily.com/releases/2005/05/050513101502.htm>.
European Society For Human Reproduction And Embryology. (2005, May 13). Season Of Birth Influences Age Of Menopause, Say Italian Researchers. ScienceDaily. Retrieved September 20, 2014 from www.sciencedaily.com/releases/2005/05/050513101502.htm
European Society For Human Reproduction And Embryology. "Season Of Birth Influences Age Of Menopause, Say Italian Researchers." ScienceDaily. www.sciencedaily.com/releases/2005/05/050513101502.htm (accessed September 20, 2014).

Share This



More Health & Medicine News

Saturday, September 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) — The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) — A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
Powered by NewsLook.com
How The 'Angelina Jolie Effect' Increased Cancer Screenings

How The 'Angelina Jolie Effect' Increased Cancer Screenings

Newsy (Sep. 19, 2014) — Angelina's Jolie's decision to undergo a preventative mastectomy in 2013 inspired many women to seek early screenings for the disease. Video provided by Newsy
Powered by NewsLook.com
The Cost of Ebola

The Cost of Ebola

Reuters - Business Video Online (Sep. 18, 2014) — As Sierra Leone prepares for a three-day "lockdown" in its latest bid to stem the spread of Ebola, Ciara Lee looks at the financial implications of fighting the largest ever outbreak of the disease. Video provided by Reuters
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:
from the past week

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