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.
Quick Answer. It takes between 17 and 20 days for parakeet eggs to hatch. The female parakeet lays an egg approximately every other day until her entire clutch has been laid. A clutch is typically four to six eggs, but it is not unusual for the number to fall outside that range. Continue Reading.