case: (Default)
Case ([personal profile] case) wrote in [community profile] fandomsecrets2014-02-23 03:55 pm

[ SECRET POST #2609 ]


⌈ Secret Post #2609 ⌋

Warning: Some secrets are NOT worksafe and may contain SPOILERS.

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Notes:

Secrets Left to Post: 04 pages, 076 secrets from Secret Submission Post #372.
Secrets Not Posted: [ 0 - broken links ], [ 0 - not!secrets ], [ 1 - not!fandom ], [ 0 - too big ], [ 0 - repeat ].
Current Secret Submissions Post: here.
Suggestions, comments, and concerns should go here.
ariakas: (Default)

Re: Question about age differences

[personal profile] ariakas 2014-02-24 03:12 am (UTC)(link)
Not to drop real science into this, but women reach their peak fertility (i.e. are more likely to become pregnant per cycle) between 22-26. Many cycles in the teenaged years are still anovulatory. Fertility declines very little between 26 to 34, then rapidly after 35 (http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002173/).

In addition, one of the reasons teen pregnancies are considered undesirable isn't merely social, but because of the havoc pregnancy under 20 can wreak on girls' still-developing bodies: increased risks of placenta previa, pregnancy-induced hypertension, premature delivery, significant anemia, and toxemia, as well as being 2 to 6 times more likely to born at a dangerously low birth weight. (http://www.nlm.nih.gov/medlineplus/ency/article/001516.htm) Women actually have the healthiest children between 25-34, whereas girls aged 14-19 have children with significant health problems at a greater rate than women aged 35-44 (even controlling for education and income). (http://www.medicalnewstoday.com/releases/249961.php)

So it depends what you consider "prime child-bearing age" - most fertile? Early-mid 20s. Healthiest children? Late 20s to early 30s. Teenaged years? Some of the worst for both.

Not sure where or how the "teenaged girls are the most fertile" myth got started, particularly when a simple trip down to Wikipedia (http://en.wikipedia.org/wiki/Age_and_female_fertility) could dissuade you, but I've seen it all over the place from people (presumably) very unfamiliar with the science and I'm not quite sure how it got started.
gondremark: (Default)

Re: Question about age differences

[personal profile] gondremark 2014-02-24 03:36 am (UTC)(link)
Thanks!
ariakas: (Default)

Re: Question about age differences

[personal profile] ariakas 2014-02-24 03:45 am (UTC)(link)
No problem!

And for the record, the findings are similar for men. Their virility peaks early, but they have the healthiest children (controlling for all other factors) in their late 20s and early 30s, with fathers between 35-44 having healthier children than fathers under 20. Men are still fertile at older ages than women, of course, but like women with extremely advanced maternal age, age linked risk factors start to increase dramatically (e.g. low birth weight, Down syndrome, etc. for older mothers; autism, low IQ, schizophrenia, etc. for older fathers). Peak baby-havin' time appears to be 20-45 for both sexes.