If she does have Endometriosis she may have great difficulty even getting pregnant, not to mention needing sperm too. Also she is very afraid of her lipo and tucked tummy being stretched so actually being pregnant wouldn't work for her either, not to mention all her infections, allergies and anemia (lowers fertility as well) she has, she would be very high risk, especially at her weight she may have gestational diabetes and we all know she couldn't deal with that.
I don't think Gabbie has a very logical mind, she seems to live her life through her dreams and has really high expectations for things only to be severely disappointed when they don't turn out how she imagined.