What ratio is larger in liters, boys or girls?

[Chic 2000]

I was wondering, do rats tend to have more boys than girls in liters?  Or is it just random and luck of the draw?  Some animals can acualy regulate what sexes they have.  Like crocodiles are depentant on the temprature in the nest.  Hotter crocs get mostly females, colder, more males.  Now that is a completely different animal that bases is gender on heat from the environment.  But I was wondering if mamals have that same ability.  5 boys popped out of Creamy and only 1 Girl.  We don't have any male rats what-so-ever.  Can rats adjust their liters to the conditions of the environment?

Wierd question but I want to know.

[Bonnie]

I don't know the answer to that exactly, cuz I don't breed um... but the litter my babies came out of was 7 boys 2 girls, or something like that.

Maybe if we all compare we could figure it out

[DebW]

I've never heard anything about this, but can tell you about the 4 litters I have experience with.

Litter of 14 - 7 boys, 7 girls

Litter of 6 -   2 boys, 4 girls

Litter of 9 -   5 boys, 4 girls

All of these litters were born in the same cage in the same classroom over the course of 4 years.  Feeding was pretty similar for all 3 females and litters were planned.  The mother rats were all around 6 months of age when they gave birth and it was their 1st and only litter.

My rescue rat, Emily, has 1 girl and 2 boys.  These were born in dirty cramped conditions and I doubt she was fed right.  I'm not sure if she had any babies born dead.

[BlueMoonGoddess]

My older ratties came from a litter of eleven; six boys and five girls.
I don't know if this applies to small furries, but I read somewhere that vegetarian people are more likely to have girls.

[Anna]

My litter was 5 and 5.
But boy did the boys outgrow their sisters! They're easily more than twice as big as my girls from the same litter.

[Evergreen Rattery]

 In humans, slightly more boys are born because they are more likely to get injured because of their riskier lifestyles.  I suppose it could be the same for rats.  There always seems to be more boys than girls in my litters anyways.