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. Their exactly locality is unknown. Probably cooler highlands.
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 spp. 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 at least 5" deep).  Supply a water dish, but there is no need for moistening other than the initial application of the substrate.  Richard Gallon found that keeping the temperature lower (65-67 degrees F) helped facilitate successful breeding. I've kept several at a range of temperatures and they seemed quite hardy and adaptable as far feeding and activity levels over several years. Other keepers' experiences have differed, however. More on that is located in Gallon's article in the Journal of the British Tarantula Society.
Food: Any bugs that haven't been exposed to pesticides (2-5 crickets a week).