Delaying pregnancy means it might not come naturally

08/05/2009

The Statistics Department is marking Mothers Day by publishing some of the numbers on mothers:

One of those showed the increase in multiple births:

  • A total of 953 mothers gave birth to twins or triplets in 2008, compared with 537 mothers in 1978. Twins were born to 475 first-time mothers, and another six new mothers had triplets.
  • In 2008, 189 mothers who gave birth to twins or triplets already had at least two other children.
  • Mothers having multiple births tend to be older. While just under half (49 percent) of mothers who had single births in 2008 were aged 30 or over, for multiple births this rose to almost two-thirds (61 percent).
  • This is partly explained by the increase in the median age for mothers from 25 in 1978 to 30 last year.

    I was 28 when our first baby was born and I was one of a few “older” mothers-to-be in an ante natal class of about a dozen. There was one woman older than me, one my age, another was 25 and the others were in their early 20s or younger. That was 24 years ago, now 28 is the median age for first time mothers.

    The age people become parents depends on several factors and its a personal decision for individual couples, or even these days with IVF, for individual would-be mothers.

    However, the growing number of people delaying parenthood has coincided with an increase in infertility and research suggests it’s not only a problem for women:

    Age is the most important factor when it comes to conception. It has a significant effect on the chance of conception per month. Even for a ‘normal’ fertile couple, the older you get, the longer the time it takes to conceive. Fertility levels diminish with age particularly with women, but recent research also indicates that age can also play an important part for men.

    A woman’s most fertile window is approximately between the ages of 16 to 25. On average, it can take about three to four months for a 25 year-old to conceive if everything is normal. From 35 onwards there is a significant drop in the chance of conception per month. The average 35 year old takes at least six to eight months to conceive.

    There’s a sad irony that couples who’ve spent years ensuring they won’t get pregnant find that when they want to conceive, pregnancy doesn’t necessarily come naturally and the longer they leave it the harder it’s likely to be.

    Dealing with infertility, going through IVF and possibly accepting that they can’t have children is very difficult for people who desperately want to have a family.

    Starting earlier definitely improves the chances of conception but runs counter to the message women my age and younger have been given about being in control of our lives.

    The message that women can do -almost – anything hasn’t changed. But it doesn’t mean we can do everything and putting off parenthood to pursue a career, to travel, build up finances or any other reason decreases the chances of becoming a parent at all.


    Research could help infertility and contraception

    09/09/2008

    There’s a design fault in females.

    We spend 40 odd years potentially being able to have children when most probably only want to conceive a couple of times.

    Then some women who’ve spent years trying not to have children find, when they want to become mothers, that they can’t without medical scientific assitsance if at all.

    And while there are all those deseprately wanting to have babies who aren’t able to, there are others who find they’re preganant and don’t want to and tragically some have children they can’t, or won’t care for.

    University of Otago scientists have made a discovery which might help with a couple of these problems because their findings could result in new treatments for infertility and also lead to new contraceptives.

    An Otago University group, led by Prof Allan Herbison, of the physiology department, has shown for the first time the key ovulation-triggering role of kisspeptin, which is a small protein molecule in the brain.

    In 2003, researchers overseas found that the then recently-discovered molecule, dubbed kisspeptin, was vitally important in kick-starting puberty.

    The Otago group, working with Cambridge University researchers, has now just published the first evidence that kisspeptin signalling in the brain is also essential for ovulation to occur in adults.

    You can read the rest of the story here.


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