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.
And, once hatched, how long does it usually take for young birds to fledge from the nest? A: The time for incubation varies from species to species but, as a general rule of thumb, it takes most songbirds two weeks to incubate their young and another two weeks before the young are ready to leave the nest.nd, once hatched, how long does it usually take for young birds to fledge from the nest? A: The time for incubation varies from species to species but, as a general rule of thumb, it takes most songbirds two weeks to incubate their young and another two weeks before the young are ready to leave the nest.