[Avodah] God who knows the future

[Lisa Liel]

On 8/16/2011 9:09 AM, T613K at aol.com wrote:
> In terms of our current knowledge of when it's too late to change the
> fetus' gender, we now know that would be as soon as the sperm and the
> egg combine.

Although all fetuses are morphologically female until around 40 days, 
which is when the body begins to diverge.  If the fetus is male, a rush 
of androgens at that point cause it to change.  There are cases of 
androgen insensitivity syndrome, where the body doesn't react to these 
hormones and the child is born looking female, despite being genetically 
male.

http://en.wikipedia.org/wiki/Sexual_differentiation

Lisa