Elevated levels of homocysteine in the blood appear to increase the risk of heart attack, stroke, peripheral vascular disease, and venous thrombo'embolism (blood clots in the veins). Homocysteine is believed to damage blood vessels in several ways.
I don't know for sure about how long Wrens usually spend on the nest at one sitting.. (Sorry couldn't resist the joke) However, the eggs usually hatch in 13-18 days, so if there were no hatchlings when that time elapsed, then you'd know for sure that she hadn't been behaving normally.
Best Answer: It takes from 14-16 days for the eggs to hatch and a further 24-36 days at least for the young to leave the nest.The parents Do not remove their chicks for safety. had a pair of doves build a nest in my grape arbor-the birds were almost continuously in the nest for about 12-13 days (even during severe rainstorm w/hail) then one day, he/she was there in the mornng and by noon the nest was empty.