Caught a news show "blurb" that said a recent study found older
expecting moms, 35 years plus were more like to give birth to boy than
a girl. Searched, and was unable to find such a study - or stats at
all online? Found only that overall chance of birth to boy is 51% to
49. Would love to know if there was indeed such a published and
credible study. Thanks for considering my question, and Happy
Searching!

http://www.moondragon.org/pregnancy/genderprediction.html
MoonDragon's Gender Prediction Charts & Links

Sorry. Couldn't find anything about the probability of having a boy after 35.

This may interest you:

"If you've recently given birth to a baby boy, count yourself in the
majority! For the 63rd year in a row, the number of boys born in the
United States outnumbers the number of girl births.

In fact, 94,232 more boys than girls were born in 2002, according to a
newly released report by the Centers for Disease Control and
Prevention (CDC). That's 2.3 percent more boys born than girls.

The report examined the total sex ratios at birth for over six
decades. The total sex ratio is the number of male births divided by
female births times 1,000.

Other highlights of the CDC report are:

Since 1940, an average of 4 percent more male babies have been born
each year than females, putting over 5.7 million more boys in the U.S.
than girls.

Combining all the years studied, older moms (40 to 44 years of age and
45 years and up) are more likely to have even odds on having a boy or
a girl, while mothers 15 to 19 years of age are most likely to have
boys."

http://www.parents.com/articles/pregnancy/6114.jsp

hmmmm...  hmmmm... there is something intrinsically wrong here. 

The sexual determination is not determined by the female but by the
male, so if in fact the odds of bringing a boy to term drops with the
age of the mother it is likely to be due to the nature of pregnancy
i/e higher demands for males than females (don't know if that is the
case). Age in either the male or female has nothing to do with sexual
determination in the offspring.

from 
http://www.biology-online.org/2/6_sex_chromosomes.htm
-------------------
Sex Determination

A humans' sex is predetermined in the sperm gamete. 

The egg gamete mother cell is said to be homogametic, because all its
cell possess the XX sex chromosomes. sperm gametes are deemed
heterogametic because around half of them contain the X chromosome and
others possess the Y chromosome to compliment the first X chromosome.

In light of this, there are two possibilities that can occur during
fertilisation between male and female gametes, XX and XY. Since sperm
are the variable factor (i.e. which sperm fertilises the egg) they are
responsible for determining sex.

I also could find nothing on the story. The thought I had was: given
the sex is determinded by the male, perhaps it was a story about older
men? (or women who have older partners?). The motility of sperm falls
slowly with age (http://my.webmd.com/content/Article/60/67094.htm ).
Male ("Y") sperm have less DNA and are lighter than female ("X")
sperm, so perhaps as motility decreases the odds begin to favor the
lighter sperm.

Well, it held true for my mom, and I am pretty happy with the result. ;)
But the statistics were in my favor, already two daughters in the family.

"Well, it held true for my mom, and I am pretty happy with the result. ;)
But the statistics were in my favor, already two daughters in the family."

Statistically it doesn't matter how many girls are born to your mother
- the odds are 50/50.  Or I guess, hypothetically 50/50.  So if your
mother had 20 girls, the odds of her 21st child being a girl are no
higher than being a boy.