No, she's not gravid. . . just hardy.

Tanzanian Stoutleg Baboon Eucratoscelus pachypus These are ground dwellers of east-cental Africa's scrubland.  They have extremely thick rear legs with tufts of hair protruding forth.  The mature males have much less incrassate rear legs. Overall, they're a chocolate brown.  Their carapaces are chestnut colored and their front two pairs of legs are grayish.

Range: The Tanzanian Stoutleg Baboon may be found in northern Tanzania and southern Kenya.
Habitat:  Dry scrubland; savannas
Size: Small for a tarantula. Fully grown, they're about  4 to 4 1/2 inches in legspan.
Attitude:  Somewhat more docile than their Pterinochilus ssp. cousins, but by no means a "hand pet."  They enjoy privacy, and are quick to stridulate in annoyance when provoked.
Dwelling: Burrows in dry earth
Ideal Setup: a 2 1/2 to 5 gallon container with enough substrate for digging in (fill it 3-5" deep).  Supply a water dish, but there is no need for moistening other than the initial application of the substrate.  Keep the temperature around 75-80 degrees if possible.
Food: Any bugs that haven't been exposed to pesticides (2-5 crickets a week).