huh... My game has glitched out similarly before... I'd say to just quit & re-launch, terminate program using task manager if the game is frozen due to this, but if it continues to happen even after re-launching then I honestly have no idea!
I suggest either using thee hyphens (- - - without spaces) between paragraphs, or one > symbol as long as there's an empty line on both sides. The line will probably look neater. Or you could just add a transparent image ~50 pixels high between the paragraphs.
I think you can get all of your information about this from your vet, and it would definitely be more reliable, as to my knowledge none of us here are medical experts in that field!
However, something I do know, is you mentioned your horse's age is 16. I am pretty sure that her fertility rates will have already begun to drop before even reaching 15 years old. So the age of your mare may impact the health of the pregnancy and of the possible foal itself. From what I have heard, it is not safe to breed horses whose fertilities are declining.