BusinessDictionary.com. Person or firm that endorses a three party agreement to guarantee that promises made by the first party (the principal) to the second party (client or lender) will be fulfilled, and assumes liability if the principal fails to fulfill them (defaults).
One in 2,000 babies are born with ambiguous genitalia and no one knows for sure if they are boys or girls.
A developing fetus has 2 pairs of genital ducts, the mullerian ducts (which will form female tubes) and wolffian ducts (which will form male tubes). At approximately the seventh week of development, the male genital system begins to differentiate.