Ads by Muslim Ad Network

Announcement

Collapse
No announcement yet.

Announcement

Collapse
No announcement yet.

Slow-to-conceive parents 'have more boys'

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Slow-to-conceive parents 'have more boys'

    http://news.scotsman.com/health.cfm?id=2414862005
    URGENT!!! your help is badly needed - fundraising for marriage

  • #2
    Longer pregnancies produce more boys: study

    Thu Dec 15, 2005

    LONDON (Reuters) - Women who take more than a year to conceive are more likely to have a baby boy, according to research published on Friday.

    Scientists at Maastricht University in the Netherlands, who studied data on 5,283 women who had babies between July 2001-2003, found that the probability of having a boy was 58 percent if it took longer than 12 months to get pregnant.

    The findings did not apply to women having fertility treatment.

    "Taking longer to reach lasting pregnancy increases the chances of having male offspring," said Luc Smits, of the department of epidemiology at the university, in a report in The British Medical Journal.

    Each additional year it took to conceive was associated with a nearly 4 percent higher chance of having a boy.

    Although the proportions of X chromosome, which determines a female, and Y chromosome for male, in sperm are the same, more boys than girls are born.

    The scientists suspect that males are more likely after a long pregnancy because sperm carrying the Y chromosome swim better through the viscous liquids in the woman's body to fertilize an egg than sperm with the X chromosome.

    Increased viscosity is thought to reduce the chances of conception, so over a longer period the chances are higher of the Y sperm reaching the egg first.

    "The time taken to get pregnant is positively related to the chance of having a boy in couples conceiving naturally," Smits added.

    http://today.reuters.com/news/newsAr...archived=False
    URGENT!!! your help is badly needed - fundraising for marriage

    Comment


    • #3
      Women who struggle to conceive more likely to have sons

      16 December 2005
      Shaoni Bhattacharya

      Women who take longer to get pregnant are more likely to bear sons than those who conceive quickly, a new study indicates.

      The chance of a woman having a baby boy was 58% in a group of 500 women who took more than a year to conceive, the Dutch study showed. But among the 4800 women who conceived in less than a year this fell to 51%.

      For every additional year a couple tries to conceive a baby naturally, there is an almost 4% higher probability of having a baby boy, the researchers calculate. The increased chance remains after allowing for confounding factors such as smoking, alcohol and variability in the menstrual cycle.

      Epidemiologist Luc Smits of Maastricht University, the Netherlands, who led the study, believes the results support the idea that sperm bearing the male Y chromosome swim faster than sperm with the female X chromosome, and can travel through viscous cervical mucus more easily.

      He told New Scientist that previous studies have shown that the viscosity of cervical mucus varies between women and that those with more viscous mucus get pregnant less easily.

      Mate qualityStruggling to be malemothers New Scientist.

      Journal reference: BMJ (vol 331, p 1437)

      http://www.newscientist.com/article.ns?id=dn8474
      URGENT!!! your help is badly needed - fundraising for marriage

      Comment

      Collapse

      Edit this module to specify a template to display.

      Working...
      X